Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a4d501353644e6…

MALICIOUS

PDF

74.8 KB Created: 2021-10-18 07:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1c80731cd0118bed2536ef8c7c31f6a0 SHA-1: 95623d81f283844cb8779a9a13e38bf81167486c SHA-256: 14a4d501353644e6b18c17c9de8ac4fdeb2ceb180ada872d13e06165dab94af9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially malicious content. While no scripts were directly extracted, the nature of the link farm suggests an intent to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/161665834ddd1a---wenelabajenebidod.pdf In PDF document text
    • http://keyday.ru/files/files/siduvatadiragawowev.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/wavunojodipo.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/12462535642.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/67374719752.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/2273144282.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/69662447443.pdfIn PDF document text
    • http://lollanaclinic.com/image/upload/File/fapex.pdfIn PDF document text
    • https://ozsahinotocam.com/img/userfiles/file/55747767820.pdfIn PDF document text
    • http://mdtrend.hu/files/file/87646501741.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vididegumapuxibowobalelum.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/jelolebezajutanupusoxom.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/73468151886.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/53289631195.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/kuvufovupuxorovanu.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/22886835698.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/gowopejititasodekunizu.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130c13aedc85---ninanot.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/zuwij.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/pulupisiruzore.pdfIn PDF document text
    • https://davaocarrental.com/images/file/91294254893.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/9608549581.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/30327348170.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/9514319996.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/57663275437.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/savobezotebez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/1hHberoKktI/uplcv?utm_term=the+fox+and+the+crow+questions+and+answersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 10924 bytes
SHA-256: 3ec67b326164269b6ec89952bb278b17d1c8e118b73354a84bc290de0dd04e01
font_02_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 15836 bytes
SHA-256: 59e5004215ffc0a90fcacfd5465ef2f875f9799bc74d43a248d0364e62b11afd