Malicious PDF — malware analysis report

Static analysis result for SHA-256 067233be486af33b…

MALICIOUS

PDF

79.2 KB Created: 2021-03-22 14:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8672bc33e0220b12b7cfeb47a6d979ac SHA-1: 7cf22a054db4bd2ffe7016984673d74a71d5812d SHA-256: 067233be486af33bde4eefdb96c3234eb2dd815607e769555eb7cea7006f796d
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://ponafet.ru/123?utm_term=january+2019+calendar+template+with+holidays PDF link annotation
    • https://cdn.sqhk.co/subetudagoli/jaQLihN/67456012357.pdfIn PDF document text
    • http://amsidisi.xyz/tenanu5iuwn.pdfIn PDF document text
    • https://siwikuzovusodig.weebly.com/uploads/1/3/4/3/134357046/sudapifopodoz-gegowafenofir.pdfIn PDF document text
    • http://jowemiverinoxop.iblogger.org/48559962261.pdfIn PDF document text
    • http://kersita.fun/what_is_the_meaning_of_the_word_autopilot22vr7.pdfIn PDF document text
    • http://ximasoj.22web.org/epithelial_tissue_worksheet.pdfIn PDF document text
    • http://shopmzm.site/ada_guidelines_2018_hba1cwcj4l.pdfIn PDF document text
    • http://xokoden.22web.org/blumaxx_high_performance_flashlight_battery_replacement.pdfIn PDF document text
    • https://wisufisuzok.weebly.com/uploads/1/3/1/3/131383924/4663eeb8.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/GMjiCgg/improve_camera_quality_iphone.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/1933866.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/UjehiKz/87167005011.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
    • http://wijetifosoxi.epizy.com/59161114336.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_b5dd7555da7849f59c24723999e7aa41.pdf?index=trueIn PDF document text
    • http://denakisewir.epizy.com/zolanudu.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_076ea187e3f54c3b9d43f9dec39605e6.pdf?index=trueIn PDF document text
    • http://ralanoregon.epizy.com/sulivonulidopegujup.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_c374bc3303344688842128deed71fe48.pdf?index=trueIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_cde53eb5e1ba40dd95e3657c301f85dc.pdf?index=trueIn PDF document text
    • http://pojudezafal.rf.gd/richard_foster_celebration_of_discipline_table_of_contents.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_5a5a49b622184cd5816ff87217e441fe.pdf?index=trueIn PDF document text
    • http://xumomevafuvozup.rf.gd/tamilrockers_telugu_movies_tamil_dubbed_free.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_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 5860 bytes
SHA-256: 7075b962d185972e8441871331b41a1ac63ce4187e7131ae4764929b36e0accd
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10636 bytes
SHA-256: e4b7143b532ba84bad79582a18e2436672e16174d8ae46a2649f5e515563eceb
font_02_sfnt_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230