Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf0791caa75bb89…

MALICIOUS

PDF

91.5 KB Created: 2021-06-26 04:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4021a8535d67a371ceb7c1dd7fe8d72b SHA-1: 5692b90c7a194ea3a9e9aead54d927d559196324 SHA-256: faf0791caa75bb89157fe02f8110109e46e3a1aa853ce2b2744013dd19cd8b5c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70eef11b24---besutobezel.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9780713a21---57290110885.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/vh82rlrtrqb36jbu3vbhp77k3d/bikejivowavulupobegejufu.pdf
    • http://angelcabrera.com/FCKfiles/file/lajapivevo.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f3081993e---vifukonakidobopilezuwus.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/eop1a0t22at209k1svo4f73jm2/sivuwowupo.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/7b9922a25897455d726d9b290241eee8/71439855904.pdf
    • http://abovomedia.hu/_user/file/zipurunalewuriva.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/iitg9c52lucipdlr4h0qivapp4/73164372138.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/5cdaafd681daaa996289c34d82a837a3/nulimewukuxeginix.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702e8d9bd8b---18890742508.pdf
    • https://micsys.in/userfiles/file/91439263546.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608271cf11394---28505337171.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609b16651adde---78144122458.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/353d0efcd437a00ce35a2746846b67b2/24374761301.pdf
    • http://maihome.hu/admin1/file/21384295742.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/5789c10f12caa266d85c268b4f979c93/kusujenevo.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/78ca33984f82f7320057292b43ce5388/24945083359.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160761834c400c---dinale.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773b3db3c7e---runoxosimod.pdf
    • http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/42442359279.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160888d78d7165---setixejil.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/0050a45d37ba58d5c047744213a1428e/jusomezuvelo.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4e7bdcbc5eded2ce869bdfa93a9afb08/56619631318.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=holtz+and+kovacs+an+introduction+to+geotechnical+engineering+solution+manual
    • 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_off0000fe3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 16792 bytes
font_01_sfnt_off00011654.bin
c297f9ce187e08a6144d97517eac97cc20324cbe01d6aec18f7a94e1c596208d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 11124 bytes
font_02_sfnt_off00012fef.bin
5e3b6b60793f0d0b885637fad1897a2bb2e26211c486133136f12c6ef0816f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEF 17304 bytes