Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e151f9e46850d05…

MALICIOUS

PDF

71.7 KB Created: 2021-03-01 08:34:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 59131c68fcc9c67452b859e915f2bc1e SHA-1: 7fd88137b37417726a981498f1bede0afa262945 SHA-256: 6e151f9e46850d05f40cd81cedde91a3c18ded8fde06e5fe6c5ec11dac6cb64f
184 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to DirecTV receiver connectivity issues, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=why+is+my+directv+receiver+not+connecting In PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/fb3c57307.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/5hcn5ij/pokemon_go_dragon_scale_evolution_list.pdfIn PDF document text
    • http://securespot.ru/paguronijusulajosagufibenxktq.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/ggjjjjA/34028764715.pdfIn PDF document text
    • http://fenellalucynelle.info/wepusojoziz1l73v.pdfIn PDF document text
    • https://tavutafaj.weebly.com/uploads/1/3/1/4/131482866/8640990.pdfIn PDF document text
    • http://nalapagized.22web.org/the_promise_of_a_pencil_adam_braun.pdfIn PDF document text
    • https://zafapuguma.weebly.com/uploads/1/3/2/7/132712217/wavupufetane_pojozitominef_fedifisanaxibes.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/e999705127153cc.pdfIn PDF document text
    • http://shoop-fp.ru/3980621610yag79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dodixuvizovov.epizy.com/xuketu.pdfIn PDF document text
    • http://fasosusa.epizy.com/zojenaluwixovironese.pdfIn PDF document text
    • http://niniwakuruvip.rf.gd/70321928213.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_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 5284 bytes
SHA-256: e5ff4dd4874221476484d9d71c674263c7d6a788201ea35c5064a8832d33e182
font_01_sfnt_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 10412 bytes
SHA-256: 005ceaf5a74ba63193e8cd870665177ef97deb0d7399a48f422e7f0a66ce1bd7

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