Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcce140da6ce745…

MALICIOUS

PDF

80.6 KB Created: 2021-03-14 17:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 09a37e4a5f962fa9c1afb5dd7f7dff7c SHA-1: 00ff5aed0bd019f9af80e07e26ca85504d654d7d SHA-256: 5fcce140da6ce7452dc4e6acb76880d7b4462eebc2500a1dc34d321cd52df7c4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious content. The presence of a URL with a 'vmware 64 bit windows 7 free' utm_term parameter indicates a lure for software downloads. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=vmware+64+bit+windows+7+free PDF link annotation
    • https://maviwodoke.weebly.com/uploads/1/3/1/6/131606431/1435e22d7d9f11.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/cwzvhe1/63628160337.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/ghtihjg/tekenenusopolonex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_6020bdf873ea5.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/hgciRPp/96298539771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fd68a064d343.pdfIn PDF document text
    • https://birexekexujivas.weebly.com/uploads/1/3/1/8/131858685/1953290.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/hhL6fgh/45644438242.pdfIn PDF document text
    • https://roralolew.weebly.com/uploads/1/3/0/7/130775143/pezolidixawiz.pdfIn PDF document text
    • http://wipineda.iblogger.org/32684051076.pdfIn PDF document text
    • https://dasewukux.weebly.com/uploads/1/3/5/9/135956745/lobewaxodazak.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/kogofolotor_gitesuv_panowidobowo_xomowav.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://wutodabegaf.epizy.com/cartoons_for_kids_tom_and_jerry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d5e83b-4541-4603-abac-02124c9c4c44/how_do_i_connect_my_barcode_scanner_to_my_computer.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_f41e0402027642f0bda8db0cd4bd1e79.pdf?index=trueIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_6656a5f2ddb64836a8a3aa610dfee433.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/370a7481-bc16-40f9-b8c2-04e6784063db/fumegivivigipededulamet.pdfIn PDF document text
    • http://davafegi.epizy.com/suvow.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_98d56cc31af648a89f7350f34ad16616.pdf?index=trueIn PDF document text
    • http://zinimivozu.rf.gd/52451475814.pdfIn PDF document text
    • http://xezipunefosipu.epizy.com/mutigupimadexalilu.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_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 5328 bytes
SHA-256: 7cfe6c496811294de5ed8519790a9c6c297fd6614466189689112f3961fea02c
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 11716 bytes
SHA-256: 65cafe49d21c09c41f8649392ad70600887491a4de9af6b703f5c0b0604ee7f5
font_02_sfnt_off00012577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12577 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3