Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec9a5b5a6145636…

MALICIOUS

PDF

72.8 KB Created: 2021-02-25 15:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 208e86b28de24ce73d521b0b0b9a143a SHA-1: 64c7d793f625df432981c06a9f7973706a0d3841 SHA-256: 2ec9a5b5a61456369569a8521de82e15dc0d36ef47b6ed1e609d7760b3f644fa
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://druttle.ru/award?keyword=fishman+loudbox+mini+charge+sale PDF link annotation
    • https://jisenevezapa.weebly.com/uploads/1/3/4/0/134095859/8098562.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fcf3d9837b92.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/03254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383797/normal_6003cdaf14c83.pdfIn PDF document text
    • https://cdn.sqhk.co/risinibigasi/nhdXggb/6104383493.pdfIn PDF document text
    • https://sanevofodi.weebly.com/uploads/1/3/0/9/130969150/7364288.pdfIn PDF document text
    • https://ridakikasidom.weebly.com/uploads/1/3/0/7/130739592/841670a74225fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_60215e69a22a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fc813c12347a.pdfIn PDF document text
    • https://xatuvapezorix.weebly.com/uploads/1/3/4/5/134595272/mosewomukinekolok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5fdcb5a0b530e.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/tudowevezef.pdfIn PDF document text
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/pilipibuxidan.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/liwara/81418713428.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/performing_gender_and_gender_identity.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_off0000dd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD32 5516 bytes
SHA-256: 31c56c7d9d7bd7cae8da8335ac0257830e0d3f0c82e28bbf05f92a6665dd67ec
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 11300 bytes
SHA-256: 0b2b64dac2ca55a46a0b28b1276cbcb84343a7ce3e7ea165b40613c347280596

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