Malicious PDF — malware analysis report

Static analysis result for SHA-256 359da523d5f07a80…

MALICIOUS

PDF

79.5 KB Created: 2021-02-22 11:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a651ce7e7fef0e33bf7f85cfe0d6c6d1 SHA-1: 84768fcd483d9b03cc1edbdf822b178ee9dbabc3 SHA-256: 359da523d5f07a800b8ea87b8b06b09f10ec5289a2f9d0d1669157f87d7ff943
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or SEO spam lure. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to other sites. The embedded URLs and the document body suggest an attempt to attract traffic related to medical salaries, likely to a malicious website.

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://jottigo.ru/wb?keyword=mgma%20salary%20family%20medicine PDF link annotation
    • https://jazemajotejavux.weebly.com/uploads/1/3/2/6/132681398/tegusafativixuritu.pdfIn PDF document text
    • https://pifabevab.weebly.com/uploads/1/3/4/7/134721676/5401549.pdfIn PDF document text
    • https://denoxexulove.weebly.com/uploads/1/3/4/4/134457588/3394356.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/babulogaxubizi-goxinoxupo-kifotidido-mupatu.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/8260159.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/7818244.pdfIn PDF document text
    • https://wiwetone.weebly.com/uploads/1/3/4/6/134660192/pevafef.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/9gficib/45040450088.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/buvafe.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/ggepjhn/41044295153.pdfIn PDF document text
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/pasirasi_zilaxi_puwekur.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/ix77RvH/74966792039.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/oTlhjPk/ponokegubunobuno.pdfIn PDF document text
    • https://baludofagufa.weebly.com/uploads/1/3/4/0/134096440/c7e97f4ba0a8d.pdfIn PDF document text
    • http://nelibagaxo.iblogger.org/dollhouse_horror_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fanedabomo.epizy.com/xedupagiz.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/5300177022.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/alikiba_wife_wa_dunia_mp4.pdfIn PDF document text
    • http://gotapomoleza.epizy.com/typography_animation_after_effects_template.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_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 5448 bytes
SHA-256: 9ad1f9cf3acc436ec0421afe430fb5481447e8a88351b3af56782c85d23c30d3
font_01_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 10628 bytes
SHA-256: 9407e1add45c94c38cffb00dd4db9cb633cdd46b20cedd6446b2cb7ec3105a8e

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