Malicious PDF — malware analysis report

Static analysis result for SHA-256 1028b8d0ec053411…

MALICIOUS

PDF

71.5 KB Created: 2021-03-15 04:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f59ccf10001469d8d3789e262cc1f502 SHA-1: 07c930d405df413d10d496ec76d8a78ada0aaf58 SHA-256: 1028b8d0ec053411b9673aeb71b7106c621400cb4993d3b3a1b5033e76770df0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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.
  • 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://fokemale.ru/wb?keyword=boss%20harmonist%20ps%206%20used PDF link annotation
    • http://nipuxikupiluzep.iblogger.org/mathematics_syllabus_d_book_3.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/64fafd.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofelagi/bgiKjjb/53162951496.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/kqhbF4b/red_ball_4_world_2.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/stringent_response.pdfIn PDF document text
    • https://xijegubusogo.weebly.com/uploads/1/3/0/7/130739006/zejufe.pdfIn PDF document text
    • http://muzomabavima.medianewsonline.com/td_atomistique.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/679317.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/JjeghA6/liwoxedexerafidarilepaxeg.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/YAfPgfq/nugemevunizer.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/5650262.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/futadefotajoxebi.pdfIn PDF document text
    • https://xolijusir.weebly.com/uploads/1/3/4/0/134016651/powaz_kadad_pizevebufexexu_lanesovab.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/rojonaduxo_somixivop_tijonemuj_bovonerifiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_258e83f87a194686881a745b980c4a92.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_cdf5c6cceb684f6ca38b13ae24d17cbd.pdf?index=trueIn PDF document text
    • http://remofexemuja.rf.gd/chota_bheem_title_video_song.pdfIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_6e9fdb428ed64a569f79e79d2ac3720c.pdf?index=trueIn PDF document text
    • http://piwodapasolok.rf.gd/16141697553.pdfIn PDF document text
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_2664e4c4f14946cab047bb2def0b0996.pdf?index=trueIn PDF document text
    • http://febarufowit.epizy.com/podofu.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/duvatu.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_77762cedf75246d7b30704f8e3eb376a.pdf?index=trueIn PDF document text
    • http://kilisajafe.rf.gd/tedanesibefoxemogeveb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF9 5372 bytes
SHA-256: 5540cb1b2e6a0ab7255e3ea89265d949a690cab36c733405a76c07ad44f2b389
font_01_sfnt_off0000ed0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0D 10472 bytes
SHA-256: 40a82c970f3e49e836b2b4ec086a2cdba0e42a6dc1d3e74ec088850d77b5b7eb