Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64e98d16675bafc…

MALICIOUS

PDF

90.9 KB Created: 2021-07-21 17:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0605cca40906866db2208f000803391c SHA-1: f3b88b8a96c9ce35787fb6acd042a0158a811026 SHA-256: d64e98d16675bafc772557f1a84b2de4ada9331c16e5c8a0a527444ee265dc62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/9lkgffo7rv9u177028487ua4d7/widodego.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/94n95crase0edua224e8oovb72/80282843518.pdf
    • https://anup.bo/images/files/83713593161.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/kpps83tgvhmlb82qoigcl5t5lm/lozenarazes.pdf
    • http://vom-ragnaroek.de/uploads/file/tejarisopef.pdf
    • http://ackerviewguesthouse.com/userfiles/file/49857943006.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4565b71b5c---29867839071.pdf
    • http://kuppersbusch-center.ru/uploads/files/dexiditukinejanurodigapi.pdf
    • https://malabarmail.com/ckfinder/userfiles/files/63469692740.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/183e3a5d05ffa2071baf999f46f6f352/88020008346.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/d58ab731fcefbec94456691b36d932b1/76180822273.pdf
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuramafaviwigomotululeve.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/828b208aea85fe1f406e8b065be0bf84/96431226247.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/82bcd94a6a308f5dba64ef000ac69be9/89768671525.pdf
    • http://zit-tech.com/userfiles/files/megavijepirosefamozukavor.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713f257b983---94260930221.pdf
    • http://ipceurope.com/assets/file/50909704051.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/17924ea89b956e4c88b8f54196c05a5d/52055518676.pdf
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/bidifefo.pdf
    • https://pasarantogelsatu.com/contents//files/63265383321.pdf
    • http://tatugigo.com/ckfinder/userfiles/files/nenegawexedamivabut.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d47647364c3---manuroxajas.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bbc018f52---vigebasikatur.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=one+arranged+marriage+book+by+chetan+bhagat
    • 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_off0000fada.bin
92476fa341b5bbb48ed9f5527456bb1a36be9cce67e04d4dd311bda1f69f0345
pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 10976 bytes
font_01_sfnt_off00011400.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11400 16792 bytes
font_02_sfnt_off00012c12.bin
930d3cf89569fb5bd47b05fd2542f1a4e89707fa5e989c7f8d8d38d3219a9601
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C12 18720 bytes