Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cf80514d6f33f5…

MALICIOUS

PDF

75.9 KB Created: 2021-01-10 08:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d6d5e1d765a7c3633edd0139091eface SHA-1: 85bd4d84d0fbf56b5685a230348d480447878751 SHA-256: f5cf80514d6f33f59209f00f9c1d350d4c1377acc6fb5281280e07fe225e91ad
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed to generate traffic or distribute further malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'cats eye gemstone meaning', suggesting a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=cats+eye+gemstone+meaning PDF link annotation
    • https://cdn.sqhk.co/tororukiwuri/gge6dgg/parujagori.pdfIn PDF document text
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/b8ee2.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/rukurazupevom.pdfIn PDF document text
    • https://site-1230455.mozfiles.com/files/1230455/nipawug.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/Z6JhEmL/22233621422.pdfIn PDF document text
    • https://zefisuket.weebly.com/uploads/1/3/4/8/134868467/tororasefijutexam.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/RgfiZ9A/heartgold_elite_4_level.pdfIn PDF document text
    • https://cdn.sqhk.co/volotedi/igHl3je/city_jumper_new_york.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/pewim.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/gf4gebG/97529897699.pdfIn PDF document text
    • https://zomutelisofo.weebly.com/uploads/1/3/4/7/134712892/mebigewimo.pdfIn PDF document text
    • https://site-1167931.mozfiles.com/files/1167931/83399167379.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/poxebipopegeg-mufezojikewef.pdfIn PDF document text
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/7539560.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/9jegja4/cowboy_bebop_wallpaper_spike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 4884 bytes
SHA-256: 278a0f60b1773f157ea9c816a8efd801b0eb2499827846c9e92b5f847731ee71
font_01_sfnt_off0000fd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD33 11172 bytes
SHA-256: 6efc6c689404f272266b758d7654358f54446f04556158ec56ef3718a3154759

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