Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df34efe969a3acb…

MALICIOUS

PDF

83.1 KB Created: 2021-06-08 16:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7f2045a819367fbe103d11c0ededc465 SHA-1: 19e6e7e88ed00b5a55694483ab0579a6762524f7 SHA-256: 0df34efe969a3acbe8633dd065521a12fdc9aae33609777d94c84d34164a5f3d
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://ketchas.ru/pbw?utm_term=chal+mera+putt+2+full+movie+watch+online+%253B+50000+%253B+0.36+%253B+2.90+%253B+Low+%253B+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388813/normal_6032d20a9dbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_60bd4464d6c5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451549/normal_5fe1a029845ad.pdfIn PDF document text
    • https://resojuwow.weebly.com/uploads/1/3/4/3/134351964/felabuko.pdfIn PDF document text
    • https://pozufijuxib.weebly.com/uploads/1/3/0/7/130775557/wegus.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/dafuvuwadejajimena.pdfIn PDF document text
    • https://womijepadake.weebly.com/uploads/1/3/4/4/134476187/7710c0159c.pdfIn PDF document text
    • https://satufikobupi.weebly.com/uploads/1/3/2/6/132695363/4306455.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4458431/normal_60b2a2b15c97a.pdfIn PDF document text
    • https://kugasesilij.weebly.com/uploads/1/3/4/7/134702015/poxijumup.pdfIn PDF document text
    • https://bodujifoji.weebly.com/uploads/1/3/5/3/135394102/werikikasa.pdfIn PDF document text
    • https://juxepikipoz.weebly.com/uploads/1/3/4/4/134486641/95b383f7b3a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_6050f92811eb3.pdfIn PDF document text
    • https://bomefojidog.weebly.com/uploads/1/3/2/6/132695402/gukulibomunepobug.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/936c9a26-f6c6-477e-9502-c6cba90157e9/what_is_the_purpose_of_dsc.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/how_to_play_2_player_on_goat_simulator_ps4.pdfIn PDF document text
    • http://nekimijazom.pbworks.com/w/file/fetch/144669447/40342627474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81dacaa8-2ff1-48f6-9ff1-ca8f06ad2303/fan_tastic_vent_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb4e716-b1b3-4fa5-ae84-9b36a3fa16b1/biblia_de_estudio_del_expositor_en.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb8ce23e-0932-4f71-97df-879eaf58b6bb/hotstar_8.2.9_apk_mod_ad_free_latest_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446f2ffc-2f19-4490-8441-771e8b524a47/xinikutobinaxarotexosaju.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_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 6224 bytes
SHA-256: c20c4d600e308759416739d0588cabf11feb41f4eda86849572b5bfcb9ff4adc
font_01_sfnt_off00011558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11558 12148 bytes
SHA-256: 4e8df83ed967b5544ab55eed056cc18f145a4ee55d01cc3e6a5dbd50cec840c9