Malicious PDF — malware analysis report

Static analysis result for SHA-256 08eb2eb147cc6ad4…

MALICIOUS

PDF

70.7 KB Created: 2020-11-17 17:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3bb1bac914f50309a053aa399eccd086 SHA-1: 756d92d322e30f673828859767d94e1f2da77aa3 SHA-256: 08eb2eb147cc6ad455436245f7a14247a4d93098c186307f218f86a78c278329
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The ML classifier also strongly indicated maliciousness. The embedded links, such as 'https://traffmen.ru/strik?utm_term=long+thuong+xot+chua', suggest a phishing or spamming campaign. Although no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=long+thuong+xot+chua In PDF document text
    • https://damuxuru.weebly.com/uploads/1/3/4/0/134040763/45503a70afd3a8.pdfIn PDF document text
    • https://xumomeroruv.weebly.com/uploads/1/3/4/2/134266579/5d7f8d80de5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zategafozasiru/fire_emblem_heroes_beginner_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2839b3-f0c5-4db7-aede-2ac05663789f/vekafajopubanosu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/aci_manual_of_concrete_practice_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131c168b-dd84-4c54-be62-243462c01e36/73577442527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ea1a29-4a4e-46c1-8ae8-508fb5d4d64e/pebufagogomitego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216d536d-062e-473c-8208-694d18ad133e/atls_2018_em_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a922529-3a7b-4d72-a4a5-a4db39e94eed/tefaxemunapakawulapovef.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/61333109907.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/cell_model_project_jello.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b7c22c-627b-471f-b830-9a4756f36289/gta_liberty_city_stories_pc_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d7fbf9-87e2-4cac-bed3-d54a0100d7ff/what_is_a_neutralization_reaction_class_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1af31f-e9b4-4409-984f-d348378e189f/xawepudedizudidori.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD98 4480 bytes
SHA-256: 01741afd263ab884152bee932b0a9443a33304da476695874d80dbc3e599c2ff
font_01_sfnt_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 10404 bytes
SHA-256: ba1ed2bf7b302b4f68f6a84348897955bc3110cfc5bd8cdb2e98940b7fac77e0
font_02_sfnt_off0001000e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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