Malicious PDF — malware analysis report

Static analysis result for SHA-256 332657742938bc8c…

MALICIOUS

PDF

78.2 KB Created: 2020-12-25 04:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a023ee912232d0ce367842048faec040 SHA-1: f06e9469e15d0c460dcbe84ba38bfccf1b82112e SHA-256: 332657742938bc8cd19a71145ca34ec168b18d21f3a217607f5932f8c98fd585
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing sites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or trojan activity. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafffi.ru/123?utm_term=los+milagros+de+jesus+capitulo+14 PDF link annotation
    • https://razebefalokugex.weebly.com/uploads/1/3/4/8/134895215/pururivekelawefujeme.pdfIn PDF document text
    • https://ximetekorexuven.weebly.com/uploads/1/3/4/4/134489871/a5572492d4e1.pdfIn PDF document text
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/1633258.pdfIn PDF document text
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/0dde9a0f7ef9.pdfIn PDF document text
    • https://cdn.sqhk.co/kefesizo/dih0ie2/jesigivukakoluwanixenesa.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/gfiejax/survival_zombie_apocalypse_mod_apk.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/fozagawoxabip.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/xasiravenejomajaxaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokofapig/android_chess_game_to_play_with_friends.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/angular_2_template_form_validation_on_submit.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/nopipifojedemomibenolak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9614d2-e4a6-41e1-9977-29639fe876a5/stow_clerk_of_courts.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/93832644928.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/jolasipirosuwosojatenigud.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/icnd1_exam_questions_and_answers_2019.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_off0000e8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D8 5552 bytes
SHA-256: 9f6f73638604ce2f1c9b81e4ec2c19125a9353126d79e60648e51765fce0db26
font_01_sfnt_off0000fbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 11680 bytes
SHA-256: 4f1f78b3df00e9df569261b36ed88921bc4211afc43e20e4c1b7c2c5da0fe0af

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