Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9a48b91a900cdd…

MALICIOUS

PDF

76.6 KB Created: 2021-04-21 03:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e20242a90adfd3b750a1f03a5e643b84 SHA-1: 81eff57377e436d137baaf8ebfa18f765b27e3b7 SHA-256: 7e9a48b91a900cdd802085f553c701c4748b40b77a678c5b611ffe27cbd0c657
186 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 0.9997

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://lozipotod.ru/strik?utm_term=ars+notoria+pdf+descarga PDF link annotation
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/sijejinakaludul.pdfIn PDF document text
    • http://bred-enligne.com/puxewusikexesid7r5p7.pdfIn PDF document text
    • http://watogoda.mypressonline.com/technique_d_appendicectomie.pdfIn PDF document text
    • http://damita.fun/can_hypothesis_become_a_theory_ifn56sk.pdfIn PDF document text
    • http://goldotzyv.ru/gijoxagimedamuvukotme0t3.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/jakujuxarut_wigitematit_zoxinikelawegix.pdfIn PDF document text
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/womiwitezefejuj_tuxudopiramip_fadapa.pdfIn PDF document text
    • http://hellochildren.online/68285511550z22by.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/wilekoxiwakilatodegev.pdfIn PDF document text
    • https://razesune.weebly.com/uploads/1/3/3/9/133986972/4722893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95aec2f9-08c2-4146-aa9a-d62b4d95b3d7/37963451534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ebf592-6199-4975-90f2-b53d16f8b901/iliad_and_odyssey_characters_tagalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcd048d-b38a-4c72-84fc-46119d2810a7/74316117388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb48c713-3498-412c-a911-069433559bff/business_analytics_master_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bc2cfd-443a-4d70-9d18-a7f0f10851ee/dozelo.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/wopemim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01145b7-bb79-430b-be6c-2e1c7f2f060f/mediterranean_diet_for_weight_loss_australia.pdfIn PDF document text
    • http://bitines.myartsonline.com/biologically_important_peptides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6851e445-a481-499e-a001-4d8c601f7d6f/wulutexivuwarot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b59ed2-dfe3-4726-b89a-807bf653a929/dear_man_worksheet.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_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 5280 bytes
SHA-256: ee41e693bb3baca7eebbce12cd75bc911b61364366a078e7af3b1a5bdc0eeeb9
font_01_sfnt_off0000faff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFF 12756 bytes
SHA-256: 234b2bb9641f4a683b2f3cb902658e76de2127a27d26e99ab7b7328675250881