Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e225672824b8c5…

MALICIOUS

PDF

89.7 KB Created: 2021-04-15 00:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4213ccac73ce1b274ecfb5a9a9f0448e SHA-1: c4bec825ed4656900fbf22750ff8056be8b014b5 SHA-256: 68e225672824b8c54f14492ba9a2511c33f46228196784408454a62b501bd6cf
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm, indicating a phishing or scam attempt. The primary redirector URL, 'https://druttle.ru/strik?utm_term=maytag+bravos+washer+reviews', is designed to lure users with seemingly legitimate content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or malware distribution.

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://druttle.ru/strik?utm_term=maytag+bravos+washer+reviews PDF link annotation
    • http://jadogaxarabu.mygamesonline.org/what_are_the_questions_asked_in_desktop_support_interview.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416139/normal_5fdfc912882a6.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/ketuperopilugub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5fe9206d2340b.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/fulawemaxewawexiliro.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/girutebixubuvutaxogabasox.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/jupivezojeke.pdfIn PDF document text
    • http://xuzobinemipivor.mygamesonline.org/lavumeper.pdfIn PDF document text
    • http://finomimetafix.sportsontheweb.net/skripsi_tentang_brand_awareness.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_0c1764b9a09f46d2acc2915e6efa713a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/14218263621.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/tracktion_6_mac_download.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_2010add1f1a3435794400d925669e704.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_b52647e93a7a4c56b8ee4aba80b2baa5.pdf?index=trueIn PDF document text
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_37ea5da0384f4bc9a8cf0f16e6486548.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_8b8f4f945ad94c9fb303b3feeb257ce9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/sepunerulefabewefepud.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/angular_route_dynamic_templateurl.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/ps_adobe_photoshop_for_pc.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_off00011dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBF 5312 bytes
SHA-256: 77cf22856c92565677bb3d5d9ef605ed639f56606fe30941b686f7dcc5b950db
font_01_sfnt_off00012ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF6 12432 bytes
SHA-256: 8144313c0d384939de803d29d57d088e0fe6c0a5bf99a7fb90cba9fb9acaa740