Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a874a0fa6846ae7…

MALICIOUS

PDF

76.3 KB Created: 2021-03-03 00:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fbebe88b0668627bfb547421cda5befb SHA-1: ce77ad72f2a035be2f242938ff76ab23839bba8e SHA-256: 6a874a0fa6846ae7336c72f4db2f130762c7210b20bba8491d1181f103b5eaa4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9714

Heuristics 4

  • 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 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://crophysi.ru/award?keyword=gingerbread+man+book+activities PDF link annotation
    • https://luzenage.weebly.com/uploads/1/3/4/3/134317967/xonuva-pipipame-ruzijiremewaf.pdfIn PDF document text
    • http://7lessons.site/adverbs_of_time_exercises_with_answersm6e52.pdfIn PDF document text
    • http://wasodez.22web.org/2006_chevrolet_malibu_ss_hatchback.pdfIn PDF document text
    • http://return-0.com/aashto_lrfd_2020_downloadkvykz.pdfIn PDF document text
    • http://bovosidifusu.iblogger.org/24766861194.pdfIn PDF document text
    • https://kokodukitibov.weebly.com/uploads/1/3/4/6/134609001/2457084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_6026f2c548233.pdfIn PDF document text
    • http://nextauto02.ru/68057471207rt9bg.pdfIn PDF document text
    • https://topudamix.weebly.com/uploads/1/3/4/5/134581811/raxodikajifejijogu.pdfIn PDF document text
    • http://giftcard-sale.store/wanidu9sv04.pdfIn PDF document text
    • http://wabuxon.iblogger.org/33756639129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5fe6884a0f9ee.pdfIn PDF document text
    • https://bexudedumazises.weebly.com/uploads/1/3/1/4/131406785/cfe0a695e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://watibanawik.epizy.com/to_study_and_verify_nand_as_universal_gate.pdfIn PDF document text
    • http://vunipirifa.rf.gd/how_to_rewrite_as_a_logarithmic_equation_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/pubetixul.pdfIn PDF document text
    • http://jonukufazok.rf.gd/jujiwizedaneziz.pdfIn 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_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 5524 bytes
SHA-256: f5a208472f8c0617c020cd2c3bbf96307f0a9e2235c797ce76e54140e5a8433d
font_01_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 1852 bytes
SHA-256: 56aab820b277fdf963b63e44449d48a133a00416359e3e985ce6bc113c31a6dd
font_02_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 10148 bytes
SHA-256: 31013c4c267c4e515f949613d0eb3605148adcfec83f51ddd050382219d2a2e7