Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d3abeadc19abca…

MALICIOUS

PDF

68.0 KB Created: 2020-11-18 16:35:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1afb484f628b05aabb4978292e225876 SHA-1: ba7f34072c0034fd894b95e64f6993d17a5a6352 SHA-256: e4d3abeadc19abcaf2863502f71121c48f6c36db0f92000d492d06f7239ee70f
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to redirect users to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The primary lure appears to be a fake movie download, evidenced by the URL parameter 'finding+nemo+full+movie+download+in'. ClamAV and an ML classifier also flagged this PDF as malicious, specifically 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/strik?utm_term=finding+nemo+full+movie+download+in PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381302/normal_5fa8d677e84c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5f9c0abf659ad.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/kipot_jevekapuxibaba_lapip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5faa626d3e771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f8a534e8ee5b.pdfIn PDF document text
    • https://letitelow.weebly.com/uploads/1/3/4/5/134500939/govumavonibel_jusesetisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8d80374d044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f8b2e64a1ca4.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/toniruzalipolazowepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fa09ded8fcae.pdfIn PDF document text
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/lakuwisijubudumed.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/576a776a-b07b-42d0-aa52-98cb4371c17e/letosibalefidijog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963ea725-0e79-4ebd-a105-131a55ad2383/jovosetafimefemoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b13272d-ab79-472d-9c98-95facf1a8c3c/bepaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8690b3-52ef-4e13-93c1-ed338df95f96/belop.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_off0000cf66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF66 5060 bytes
SHA-256: a48430bea5d4c9237e05cc6f05964f07217151f4ffc43b04a0cf076d38882fbd
font_01_sfnt_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 10120 bytes
SHA-256: 917aa28131abd0b59ea0c27f5c7254cd04b301de7d5f82edfd97430b969581a3

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