Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccccae93dcd7388…

MALICIOUS

PDF

82.8 KB Created: 2021-08-14 14:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eac30f068f1dd5961372fd7a9f722907 SHA-1: 1ed39d11ada9ec85af13de7669272617cb373f03 SHA-256: 3ccccae93dcd7388c0dc23e07fe02c3386fe54b796d0702489b490a2bf01601b
196 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam lure. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997506a6aa3---14974484505.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/67905051617.pdf
    • https://signika.pl/Upload/file/gibinegojumore.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160809ad607f7a---famepeto.pdf
    • http://quaint-house.com/images/blog//file/beguwasidisipuxesedeli.pdf
    • http://chromoink.com/updates/file/divimebabononanikib.pdf
    • http://www.zaluziemalina.cz/userfiles/file/73926982769.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/i1ooe5097kaqipj73g0d5lt166/saziperabijizuzosu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a33b7707b3---rasawaxewaredufa.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608524535bcd1---66839459745.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/2623dc99b1ce4bc02b46dbdc1d9ebb14/4818372875.pdf
    • https://kund-in.com/userfiles/file/tixeroranujevelusukaz.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6806606f1c---kevatosi.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160801566b469b---44447744958.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/93016176918.pdf
    • https://olterus.net/contents//files/nabivobakubowujutugoxoba.pdf
    • https://nabsangram.com/userfiles/file/vonuxokogizinugefilonepe.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceb60f2277---2830507270.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/b44eb293e8883a844e9e83da1b62d00a/bopudenafifusuzujejov.pdf
    • http://martom24.pl/martom/userfiles/file/2558699693.pdf
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/nefapikamof.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/medenokogafebose.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d52a8899e---32763451961.pdf
    • http://eperon-kochersberg.com/img_db/36166439793.pdf
    • https://iwnta.com/userfiles/file/85491524267.pdf
    • http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/78087611334.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=us+math+kangaroo+2017+questions+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_off0000dc2e.bin
84f38ab6cc7bc4fafd6abea77cccae1082b5489fe64699524e488d6d4111f790
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 17780 bytes
font_01_sfnt_off00010ad7.bin
09242a9aea69c1fa7a21e32c2eda7cfbd31c6586519e2c3e7ef7038564c1fb05
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD7 11588 bytes
font_02_sfnt_off000125c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125C4 16792 bytes