Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b7accbf32607a1…

MALICIOUS

PDF

70.9 KB Created: 2021-03-14 05:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8ee04ca477d900aac743cf7736bd6ee3 SHA-1: ab8836a32656ecc9d273aeeb748f1dba53b92144 SHA-256: f1b7accbf32607a1c772838a7ab12165244f13a5e24e39154c83b37a234873b7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8212

Heuristics 4

  • 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 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
  • 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://soxebez.ru/award?keyword=airliner+world+august+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/nikofejujel/iaEigFG/my_collections_account.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/T49pTjg/stair_dismount_mod_apk_2._9._1.pdfIn PDF document text
    • http://springwin.space/amar_ujala_e_paper_allahabadw40pn.pdfIn PDF document text
    • http://podarokinsta.online/kojumuduxamefc7uix.pdfIn PDF document text
    • http://zoxifowivo.iblogger.org/subphylum_atelocerata.pdfIn PDF document text
    • http://xatasawijuli.22web.org/98442474222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_cf011174901542c5b3bc7509b8e2f013.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96749138-2750-4dc7-94cd-b0b619876678/8281659760.pdfIn PDF document text
    • http://xuvafinuvewabek.epizy.com/what_to_the_slave_is_the_4th_of_july.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56991d4b-b083-41c7-bb26-43275b490b6f/how_to_use_earth_stove.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_2e78eac66ee444399bc6a4b94eb419f3.pdf?index=trueIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_78358f1868524c908b7de2a62d6e6672.pdf?index=trueIn PDF document text
    • http://votitagupen.epizy.com/ancel_keys_starvation_study.pdfIn PDF document text
    • http://tepuxasimu.rf.gd/fomixikobe.pdfIn PDF document text
    • https://6f0a1f77-3195-4c90-aae7-8e5805bb56bd.filesusr.com/ugd/f94fd0_0110907b180747c8bab6ae917e80bf9b.pdf?index=trueIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_e9a193823cab4043a4e971a803af9c68.pdf?index=trueIn PDF document text
    • http://lededisizu.epizy.com/27355337182.pdfIn PDF document text
    • http://gevorewububew.epizy.com/59985840426.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 5448 bytes
SHA-256: dc99a20e4fb49b9b6bd6e31cb87e76e000e83948d2e4bc59357b713a4137548b