Malicious PDF — malware analysis report

Static analysis result for SHA-256 317f6b93d947ede4…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 00:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5981d8a69d77c5199ee7b8f1a4f0f7d5 SHA-1: 220aac8157838c349defb8a07e8615e387b159aa SHA-256: 317f6b93d947ede45b7ba6cb03ab687af6795bf93cb8727519e73f25cec13870
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, many of which are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to distribute unwanted software or facilitate phishing. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=twitter+video+downloader+apk+for+pc PDF link annotation
    • http://mekujoviwe.mypressonline.com/linul.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/P9jf0XR/heroes_of_order_chaos_pc_download.pdfIn PDF document text
    • http://repair-monokoles.ru/mta_the_bronx_ny_10473c2jte.pdfIn PDF document text
    • https://wojowoseda.weebly.com/uploads/1/3/4/2/134266381/2066581.pdfIn PDF document text
    • https://pavimukafimedab.weebly.com/uploads/1/3/1/4/131483282/1329100.pdfIn PDF document text
    • https://mibirewisurux.weebly.com/uploads/1/3/5/3/135313447/gupinofafeno_nurubosubexeg_tusamafodesexi.pdfIn PDF document text
    • http://redpandarecycling.com/daminiketomimepelosrsrck.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/adjectives_to_describe_wet_weather_top.pdfIn PDF document text
    • http://mikrotikwizard.com/99780653300elks0.pdfIn PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/vumanevu.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/4049835412.pdfIn PDF document text
    • https://tolonatapuxid.weebly.com/uploads/1/3/4/0/134042297/gufimuxadido_fekusupowis_pidonunexafefip.pdfIn PDF document text
    • http://aycotoro5.xyz/rujuketog2ddci.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litorow.myartsonline.com/vemurisavawoza.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/53354505061.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/98241205537.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/cellular_respiration_pogil_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0a00ad-3b67-4597-bb77-64762558c4dd/tutatun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ee481b-f635-438a-a250-180f66ebaf85/how_to_start_your_own_market_stall.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/fitted_sheet_queen_size_ikea.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_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 5136 bytes
SHA-256: e05ac87ad30cf123f2789cba6f3047e4f0f77a61b94fae01713af038f8a4110d
font_01_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 10828 bytes
SHA-256: 11b358b1fb1c2fbc9fcf3192c0dfd06e7f70778d480c5e25697de915ac2d18c9

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