Malicious PDF — malware analysis report

Static analysis result for SHA-256 84eb016a8f4d0172…

MALICIOUS

PDF

98.0 KB Created: 2021-05-28 06:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a0cff49636b83dd8a2aa362ce95f5693 SHA-1: 5787e0a78ffcea0b526932ed41f629ebe893d203 SHA-256: 84eb016a8f4d01721173c667e34bfc96f79de47a32128dc702bbf4fea3542e94
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to external PDFs, one of which is hosted on a disposable domain and uses UTM parameters, suggesting a phishing or malware distribution scheme. The document also impersonates cloud services to encourage user interaction, and the presence of a password-protected archive lure indicates a method to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/strik?utm_term=alice+in+wonderland+hindi+dubbed+download+300mb PDF link annotation
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/8844957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fe6be7b6d9b6.pdfIn PDF document text
    • https://xaviloxoganobe.weebly.com/uploads/1/3/1/3/131383750/likabubefipudoleb.pdfIn PDF document text
    • https://fogoravirekan.weebly.com/uploads/1/3/4/3/134335139/7dd8019763e8d4.pdfIn PDF document text
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/neminozuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_6027897ee0784.pdfIn PDF document text
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/709756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_603eb8cd24fc4.pdfIn PDF document text
    • https://rorogujelid.weebly.com/uploads/1/3/4/7/134702732/rumibovukudafe_xevodinas_fakuteb_fokaviwukoke.pdfIn PDF document text
    • https://domenotupeloli.weebly.com/uploads/1/3/4/6/134685365/mesajavujunaxasebuk.pdfIn PDF document text
    • https://mirujodafepofon.weebly.com/uploads/1/3/4/7/134707115/nikotonita.pdfIn PDF document text
    • https://mufiwejugoj.weebly.com/uploads/1/3/4/3/134340856/65a0f9e2d4a3cb4.pdfIn PDF document text
    • https://towoxaji.weebly.com/uploads/1/3/0/7/130740158/f687df4e2548.pdfIn PDF document text
    • https://dukilasurijase.weebly.com/uploads/1/3/2/8/132815907/derakigafakob-gobafawu-memaxabomoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec1d83d-a141-43fd-93e9-6de7e51ca131/xidoxedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feab0383-8323-4483-93fd-cf9fd8b974b4/cuanto_mide_5_8_en_centimetros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b99d8e7-2499-4923-b0f2-c99a81f8cd2c/how_to_work_with_a_sign_language_interpreter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcc3c00-2c89-44db-89bb-e7aa4c47a5dd/forevobipunefemumebaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62986959-ac24-40e7-9c74-f320ccffe6f9/colors_of_mini_dachshunds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a176ab94-4753-41e5-b8f7-3323ef6510fe/56897290289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73518f0d-815c-4dff-9b17-d5a449d601d7/complete_book_of_framing_scot_simpson.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off00010c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C75 3212 bytes
SHA-256: 6b73578daef1490c1b2929d0444a811a164443739a69df5ca7509217de3ce98a
font_02_sfnt_off000117f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F3 5528 bytes
SHA-256: 0b1dce01f9df40d6c57173034b688b6d62870f6b25d3db41eb93b4302e553783
font_03_sfnt_off00012a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A99 1704 bytes
SHA-256: 172930bac85bd3bd98a30b6a3451fa7d886b4850dc15fb1c8e56fbc00c23d766
font_04_sfnt_off0001331b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331B 13616 bytes
SHA-256: e896e1c9113039bbd80e699c7bbee28c25b16455ab3b7e0db17e171c38121933
font_05_sfnt_off00015e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E9F 16956 bytes
SHA-256: d7a9afec90888149c95e13985b6646661af43b390587bb033d81f8d6aca6b7e9

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