Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd8be3c6d599d06…

MALICIOUS

PDF

72.0 KB Created: 2021-03-22 12:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d640fabccc89ee64368f501ca032634d SHA-1: 184e151391222defef9d55d87f21ef3aacc5511d SHA-256: 0fd8be3c6d599d060752de28c5fbfe82698dec4b8a04e79991bf162185c22252
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 0.9959

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://mezovuduw.ru/wix?keyword=wayne%2527s+world+filming+locations+chicago PDF link annotation
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/87b7904.pdfIn PDF document text
    • http://borutafag.66ghz.com/cerberus_guide_osrs_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421214/normal_6035cfe56e7df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455907/normal_60265afd304bc.pdfIn PDF document text
    • https://wovofonunubani.weebly.com/uploads/1/3/1/4/131408017/bekobigadubeje_fidil_tesedaz.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/xoludeg_papasugurumep_xufixawaguj_bumuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_601259ed70282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_600d8695a5d48.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/duliro.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/fafujuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_60432eb04afdf.pdfIn PDF document text
    • https://lixumubol.weebly.com/uploads/1/3/1/3/131384516/tadunuzikutenivixijo.pdfIn PDF document text
    • https://tupivoxutod.weebly.com/uploads/1/3/4/4/134467409/c02ef2bd3.pdfIn PDF document text
    • https://forajezar.weebly.com/uploads/1/3/4/1/134108615/3415542.pdfIn PDF document text
    • https://manoduxasef.weebly.com/uploads/1/3/4/0/134041035/zudov.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/fekifuzulefesolit.pdfIn PDF document text
    • http://pawedipavixet.22web.org/washington_football_uniforms_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490929/normal_5fcda84fb3a98.pdfIn PDF document text
    • https://povaxabo.weebly.com/uploads/1/3/5/9/135976235/2489553.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5fce008b35ad6.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/e11296ba-1eb3-4314-801a-9203259a1819/shadowrun_game_timeline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fdd48b-211a-48d9-a9c0-f06f9d545026/vuvepobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4135f905-9f20-48ad-abd4-7e9eb451758d/how_to_remove_old_badger_garbage_disposal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5670a52c-3aa1-4d4f-9fce-179718b343cc/como_hacer_una_oracion_al_espiritu_santo.pdfIn PDF document text
    • http://sujidise.epizy.com/moscow_metro_map_english_2018.pdfIn PDF document text
    • http://defozuwonig.rf.gd/acknowledgement_letter_template_document.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_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 5676 bytes
SHA-256: 593f17fe33b2a3d307b96a7475de8feb92bdcb6eb97624f923c7c950f7af3f00
font_01_sfnt_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10848 bytes
SHA-256: 4a658ae1e8bd90c5e43c6ab22fb1828204b45c69082024c27c2d10765e9f430a