Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd38606b9189b67…

MALICIOUS

PDF

208.5 KB Created: 2021-06-14 10:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f3892a314077d415ff7a0fd6620f22e8 SHA-1: 74db0682774ec8771fe6d2099d078ba4d3ac6c79 SHA-256: 1cd38606b9189b67f499f2eef4e2655679de684ec315efd0e7118ed599c28871
174 Risk Score

Malware Insights

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

This PDF file contains multiple links pointing to compromised WordPress upload storage and SEO redirectors, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates the lure is likely related to a 'free-download' scam, aiming to trick users into clicking through to malicious sites. No scripts were extracted, but the presence of numerous external URLs and the ML classifier's high confidence score strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://laborke.ru/uplcv?utm_term=life+after+death+deepak+chopra+pdf+download PDF link annotation
    • https://eatorhours.org/e-bussiness/fckimages/file/16027255250.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/wenaboboxivesetatodexedad.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/rizifet.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7959489728.pdfIn PDF document text
    • http://contextuae.com/resimler/files/66552479492.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/157uo994t1c0jd03d743o84q95/8676594255.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b6374e4b1---92276241740.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c430b041ba7502ffecfe8593d0015ffc/84880600383.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/7e1f9251d879c432de7a82ac7b50b306/sofajegenejofoz.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a9d4250166550cdd633ab27f155f3c40/wonaxajekiwokanoxigifo.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/np39aqir58190b0gnp85op2t0i/75255231792.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/81829684129.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4af2bd6949---losonadowem.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/zefukubelofapafu.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa14022bb082fccc976cccac147043cc/86032611227.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/d9a8624289d094f95d120be375bebf60/63057060180.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/135120d2cf883e33c020b2ebbe510d93/lugawijuzuvat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002cadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CADB 9008 bytes
SHA-256: 9e2628b159067b4b0ae98ddefbd06fc7f412af533578bd81c3bb9ebc6bee0bfe
font_01_sfnt_off0002e7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7E9 5164 bytes
SHA-256: 981583c209ec9cbb793157fc6ecdbcf20eceef18609b3b137c06c81d5fbfd7a5
font_02_sfnt_off0002f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F98C 18360 bytes
SHA-256: e44c9676c215e5653313e2615486aec07caca99b3c2b5c071bba9644d7c02918

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