Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf9d57976191314…

MALICIOUS

PDF

77.1 KB Created: 2021-04-04 07:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 39c22a05d78a80866f4f3bc1a445e57f SHA-1: 8b619791f6befb702541870fcd15cb96864ae8db SHA-256: 3bf9d57976191314c7b743850d73f188fb1985d33cbad3bd7c983ff4f6ce8d0c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=how+much+does+genetic+testing+cost+during+pregnancy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403561/normal_600b7970f3d87.pdfIn PDF document text
    • http://verification-help.com/jetinoxosepogotyf0pe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_6053010f36e57.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/biochemistry_concepts_and_connections_free7emqf.pdfIn PDF document text
    • http://notudokebifapaf.22web.org/zogimeriseje.pdfIn PDF document text
    • http://lerob.info/philips_remstar_pro_c-flex__partsgptkp.pdfIn PDF document text
    • http://sukozuxari.22web.org/happy_birthday_cake_name_photos.pdfIn PDF document text
    • http://dayzcommunity.info/is_lithium_oxide_ionic_or_covalentwbuwb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_5fe76f607fe5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fe9f4b103286.pdfIn PDF document text
    • http://beach-fruit.fun/labujejugzh3w.pdfIn PDF document text
    • http://tedewirivotu.iblogger.org/lijonufopefezupot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surobufalinaxis.epizy.com/artscroll_siddur_sefard.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_327c230e12d544518da54bd2aa4063f1.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_695b9a460f174d68a1ea4c190363b6fd.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_45ec4397b59346ac813f419e2ec7b258.pdf?index=trueIn PDF document text
    • http://marisavibawizi.rf.gd/77317469875.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/12600555858.pdfIn PDF document text
    • http://pabiluset.epizy.com/35743495929.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/79187299834.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/apple_iphone_10_ringtone.pdfIn PDF document text
    • http://sejofinudagiji.epizy.com/xunajinesexizewujilap.pdfIn PDF document text
    • http://puzaxegeka.rf.gd/sodetabopalodonofilizojas.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/suxusivajejuw.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/51062400686.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_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 5608 bytes
SHA-256: 49b4d3ece8600201258b0ed615784d49caf7fabfb8bc501abd4053eb8893b9db
font_01_sfnt_off000100a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 11016 bytes
SHA-256: 759e82361618f412126001d5a06ef7b52fa2953ba07068bb53a0bde1f91180b2

Open this report in the interactive analyzer, or submit your own file for analysis.