Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2fc0fc495d08cc1…

MALICIOUS

PDF

76.2 KB Created: 2021-01-25 01:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2f580d34867e92d5d500fcaaea606ed1 SHA-1: 9038ad0c23af336ca92f5859fcab380f36c27a08 SHA-256: a2fc0fc495d08cc1fe177268e9a38b7021c666667a5dbbeef1261fab6d510388
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely phishing or malware distribution. The document body, though heavily corrupted, contains a reference to 'Google hangouts on air studio mode', suggesting a lure to trick users into visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://trafficel.ru/123?utm_term=google+hangouts+on+air+studio+mode PDF link annotation
    • http://findattime.com/wiwakirozibudinmdiq.pdfIn PDF document text
    • http://aydym.club/943703176827lfio.pdfIn PDF document text
    • http://lifeshop.pro/gudelagexulegikupapimakfa8n.pdfIn PDF document text
    • https://ketezujozak.weebly.com/uploads/1/3/4/7/134744557/2436776.pdfIn PDF document text
    • https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/842f757b13ea.pdfIn PDF document text
    • https://ronitodusod.weebly.com/uploads/1/3/1/3/131380212/mejawuduzewu_dulelop_pabagesipenuva_pevinupisakev.pdfIn PDF document text
    • http://oneitstore.info/84913463181yearq.pdfIn PDF document text
    • http://alex-travel.moscow/survival_island_seed_minecraft_bedrock_edition1m3su.pdfIn PDF document text
    • http://mybiol.site/60328904305le4hp.pdfIn PDF document text
    • http://wordwild-store.com/radio_rock_online_espanol7nhh0.pdfIn PDF document text
    • http://reduslimitaly-official.site/37220031515nqm0s.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/33129f3df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kuboki/aut_aut_kierkegaard_libro.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 5272 bytes
SHA-256: 18b6022b9aa989226cb119be9a6c0a453fb73138dfdd4f027cab83ae3650446c
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 10464 bytes
SHA-256: 63b92747e63d5ff3639a6b0db9e10fedc67c977946dd8dac0f17246f5542fabe

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