Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf98d4e1910c9ae…

MALICIOUS

PDF

89.0 KB Created: 2021-03-22 02:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 66a971cdfeb3ead95f04df213cb0c183 SHA-1: 29b230e1688818b92f0398037e6dd587842fd531 SHA-256: 0cf98d4e1910c9aeb789c34f64279dcb457685b548f62e3b35d1dab79daf4ead
126 Risk Score

Malware Insights

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

The PDF document uses a lure related to building a chicken coop to disguise its malicious intent. It contains a large number of external URIs pointing to disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious content, likely a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://leonvi.ru/strik?utm_term=how+to+build+a+simple+chicken+coop+for+6+chickens PDF link annotation
    • http://luchdobro.site/tetipib2zq.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/oijZdFJ/mujalines.pdfIn PDF document text
    • http://rotukefune.getenjoyment.net/oxford_english_dictionary_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/1iggdjd/dino_run_unblocked_hacked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_6053cbe84dad8.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/how_to_change_oil_on_kubota_svl75.pdfIn PDF document text
    • http://organic100.fun/xamilerolabutivuwosubowy76r.pdfIn PDF document text
    • http://purubifo.medianewsonline.com/yasin_sharif_arabic.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/lojuwanevufenuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419451/normal_6011be089f88c.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/is_honey_badger_dangerous.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/unity_assets_bundle_extractor_among_us_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_6020d0639aa6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_6012240eb0d55.pdfIn PDF document text
    • http://dfwshootersupply.com/7520160491471uxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_447d2243ca5d49d88d43a62c6c699aff.pdf?index=trueIn PDF document text
    • http://sopavame.onlinewebshop.net/bixudusilesisigakikemif.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_c4f1997cb55d4b7cad6a77ee29efa892.pdf?index=trueIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_e5f8a65efee3485298fd241f84f40521.pdf?index=trueIn PDF document text
    • http://zesafemumibow.myartsonline.com/where_can_i_find_straight_talk_refill_cards.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_off00011b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B07 5808 bytes
SHA-256: 5240270d847082e419617db96946b4c185451d4095ea3800b0592aebc4a03d49
font_01_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 11080 bytes
SHA-256: c25fe565422ea6003be4b234786e8bd3956867aba18f04e82ea270e52f202da8

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