Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fca1af6f604dba6…

MALICIOUS

PDF

78.7 KB Created: 2021-06-01 04:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05ad8d2b1456b5d91469bd5ec6bf47c9 SHA-1: b98fa32a5f09eeb32508aefed0956f535541181a SHA-256: 2fca1af6f604dba6a51f67533b3e8e9117dbdc53ba0b8a2e8f765319325ebc9e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://philabc.ru/pbw?utm_term=skam+noruega+temporada+4+capitulo+8+sub+espa%25C3%25B1ol', appears to be a lure for potentially malicious content. ClamAV and ML heuristics strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/pbw?utm_term=skam+noruega+temporada+4+capitulo+8+sub+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fdc094a076c8.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/2e3c89b3e945c.pdfIn PDF document text
    • https://maxugiveworupuf.weebly.com/uploads/1/3/7/5/137513679/vexasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_6043ff7e18b26.pdfIn PDF document text
    • https://juzolafer.weebly.com/uploads/1/3/4/3/134382033/gokel-jurewalure-juwuki-tagufizosaj.pdfIn PDF document text
    • https://dugesadodi.weebly.com/uploads/1/3/1/1/131164249/94f69e1db49dc6a.pdfIn PDF document text
    • https://bewobuvepo.weebly.com/uploads/1/3/2/6/132695749/3571311.pdfIn PDF document text
    • https://bodonejuw.weebly.com/uploads/1/3/4/6/134686214/wisawoxomaloli-sojapiwos-zituza-sezux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_60590aeb7e4c6.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/valumosawaxopit.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/fcc9aa96-0243-49a8-9327-2f7836428c22/mazesexoluwovemexob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba58493-cca1-42de-b339-c5c8cb3eefed/72100820559.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/w/file/fetch/144441396/tahoe_service_tire_monitor_system_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdfce08-2cf8-4e6a-9ee8-c3a3b7f68557/peavey_classic_30_price_australia.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/f/sivotogavejefoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3ff5a5-b842-402c-95af-7a478a6e259c/how_do_i_reset_my_hp_printer_to_default.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5201576-852d-451c-a682-2307603c8e4b/61624976632.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D3 6196 bytes
SHA-256: bcf839be96a9f37e195634bac9a2378c89303e82ff2dac8c4b7042fc5b763b58
font_01_sfnt_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 12732 bytes
SHA-256: 41fd374d557b188a79d8310253d042052968e836ff132d6a69eb927e999eb90d
font_02_sfnt_off000114aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AA 16376 bytes
SHA-256: 2cd66c259e55d1773bd2e1e48df6470876064c0c225d016e9bb8f016e462f374