Malicious PDF — malware analysis report

Static analysis result for SHA-256 d263856cd6a33403…

MALICIOUS

PDF

119.4 KB Created: 2021-07-13 17:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fe4b55812780c1b86d393f6d1872c1a SHA-1: ec53dc9254989c376f63409fe8b8b0053c01a56a SHA-256: d263856cd6a3340337e80f1bc17bfdc771b9fd594c14eee528df2c46aa55d948
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body was unreadable, but the heuristics strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=rock+band+xbox+360+all+songs+cheat
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3ae0ee8ff---nosim.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/8ug4r4h8v8dvj3a0tg1kd1l010/pawawogumosukudixisikusoj.pdf
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/96393246472.pdf
    • http://hugslock.com/app/webroot/img/files/84485539021.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf8b24bae8---93394433998.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777b16564d1---47505289344.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/2396235f81a5d28c3747fb899e01d0ce/28617142724.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/o5a9686mfj72i1s4l373rhg2l8/katenogewuwetonademekol.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c753bc45a3---23147296072.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/bd11ee2d733cc629132a53cc4b8967a7/34819435536.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6b6d5d1c5---sisuxixokumirud.pdf
    • https://rugsinc.in/UserFiles/files/padujigogebijarelisaduw.pdf
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/45717919272.pdf
    • https://zoomkish.com/basefile/zoomkishcom/files/836823506.pdf
    • http://dieta-plus.pl/userfiles/file/91068585044.pdf
    • https://steammining.com/userfiles/file/besuwufur.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/1ba2c514f844565d59baac00960cb618/6078840342.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d1b04e09---futizoxigixewizevadexus.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ce83662fe---57364761255.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/bdfe51e4e0fb566945cb069fbae1c8db/64987269752.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd59363a8d---buvapojep.pdf
    • http://banphimchuot.com/userfiles/file/tikoluzeferejatemoparat.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3r406obkejh2903bdqreohgcgk/73229381173.pdf
    • 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_off00016df3.bin
38f795ce7e726acae6b592a5f3c50d6bdff49eb371dedba080080cac9dade0de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF3 18280 bytes
font_01_sfnt_off00019e27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19E27 16792 bytes
font_02_sfnt_off0001b63e.bin
424d9b64d14612e7a457be1f33a117f91e6aad91ec24e1254fd8d5e038827e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B63E 11300 bytes

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