Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e084009c7a2b98…

MALICIOUS

PDF

94.7 KB Created: 2021-07-01 10:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09af7650faf21c1e9af182307904f41d SHA-1: 5f976f134151b1bd101bb36b006c40316bbd107b SHA-256: c1e084009c7a2b98c2164b4a240e8a3e045808ebcfb0802ef228cdcca86de4b2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning model as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a404552dece---pomot.pdf
    • http://sunnysidehigh65.com/clients/d/d0/d00d1ad1640c45b888f5e58ac216a5d1/File/xaxuxebopusemad.pdf
    • http://esoftland.com/userfiles/file/63960871620.pdf
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/33302859290.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/0f31d29ef2503d4d71f5cec5040a9269/70966716024.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ae595aa91---42049977988.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d08c0f80---warizugidonejupot.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/46696554230.pdf
    • http://kaupa.cz/userfiles/file/45680738328.pdf
    • http://arci-mp.fr/admin/File/31829546312.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac73ae4ad24---43714713975.pdf
    • https://acrgroup.nl/userfiles/file/27882743712.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/dibudoretakivipelogenugur.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9f83af0036ff3bae2b7ba55a9abeec07/30411400873.pdf
    • https://rmp-familienanzeigen.de/cms/files/jazawofivaz.pdf
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/79590326736.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/16sjmfqf0invn2g9dkhulhv7ao/75065640769.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/od0ubuo24n9docclt0gs6tt499/xuwuzolavujofubized.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2692f674d4---doxivofoxom.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e9ea06686ebd1589eb9fd1c995e492d1/xogaxajanalepuma.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5507735a1---kanuwud.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b3faeecc1---lisebajivofa.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9684249d1---taxetoxamobinipiwasuju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=is+pudendal+neuralgia+curable
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110f2.bin
0e2bf2fdc018a8675c74fa87c87d36aa6ec2931edbe52ecd958cf44cb036b15f
pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 10664 bytes
font_01_sfnt_off000128ff.bin
663adfe5042e5cbe3475c479991193bc239d2287fb35769db4de924e67339b39
pdf-font-stream PDF embedded font (sfnt) at offset 0x128FF 17352 bytes
font_02_sfnt_off00015597.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15597 16792 bytes