Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0056aa2fef97170…

MALICIOUS

PDF

157.1 KB Created: 2021-06-28 00:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a39cc0f734a717577eb388fd37bff0f1 SHA-1: 8c10f8d15e8ee44f752d9f6713a1d6791a09b2c5 SHA-256: d0056aa2fef97170c3c4fb3e385e1a37f210b87a23628530e28f889af567ac69
204 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm pointing to compromised WordPress upload directories, likely serving as a lure for an advance-fee scam related to parcels or lotteries. The document body is heavily obfuscated and unreadable, but the presence of numerous links to potentially compromised sites suggests a malicious workflow designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b76c3168b---zagosivelejowixanawux.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/dvahfm4dchmki86lsh2vho0bkc/33389202787.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f26d6df0d---pedegajixonopegi.pdf
    • http://geometrarontani.it/userfiles/files/vutiwepasunupivugapakesil.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890bf4d1843---tobabufofuzugojifim.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/58e73654914f85402774f827be171208/61177220187.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5741d864c---67265213704.pdf
    • https://advik.net/userfiles/file/93831298716.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b47b77c74---83168793417.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/ef73fc1b757cf528c942f4b2caef39d0/29698400456.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/b02jlt21jdte1kvf0p090e7ba2/48340851467.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/lclucb40ah5fag3cu4pl298v04/4541432416.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/43inqdbalp2ab0298aehsn4c19/manekameju.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/xekekowojifi.pdf
    • https://vibangthuaphatlai.net/uploads/files/sudumipasujizil.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/q2ce7shgkj5nv8r1uaf22fisas/80463377117.pdf
    • http://bienbao.org/uploads/files/11026293354.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/02511ee0a747fee37c5245a577bbb963/8389216587.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/f9292d13a8d79496530a2460e136df4e/6761125049.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/6c60f8273ed38e90be8ddc5999592316/momekakixedaw.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/purax.pdf
    • https://alamansyria.com/userfiles/file/53406819392.pdf
    • https://akproauto.net/nbloom/fckuploads/file/18253976083.pdf
    • http://archi1919.com/smlclub-files/file/60646481461.pdf
    • https://fajanav.com/aym_image/files/dodurefelilakama.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=seattle+displacement+coalition
    • 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_off000204b0.bin
ff272e4443e10b4b44605d9b6ceaf3c4562f878e8bbbb4680f5e3f8026657e27
pdf-font-stream PDF embedded font (sfnt) at offset 0x204B0 10648 bytes
font_01_sfnt_off00021d01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x21D01 16792 bytes
font_02_sfnt_off00023513.bin
cf8ed59e7f761f814327e6bfd71c271fa42e69cd8176a916213a4191afd85b98
pdf-font-stream PDF embedded font (sfnt) at offset 0x23513 18388 bytes