Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca43f0ae78c2ef7…

MALICIOUS

PDF

69.6 KB Created: 2021-05-07 05:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2b505ff13aa4a2d359c2822b16793a1 SHA-1: 35792e0bf1b657e4b170890e539402e743b8741e SHA-256: fca43f0ae78c2ef70198c48cc4215d3cd6fa8c16c9c4e805b8eb259dacdadb0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute malware or phish for credentials. The document body, though heavily obfuscated, contains references to 'alien shooter free mod apk android 1', indicating a lure for users seeking game cheats or pirated software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817194ba95f---26517509876.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e69b883919---widirovefifemixuxevubo.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160907e7488eed---37587325226.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/dipuvotapupinutukoxone.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/vcit5o1m7v7l40sm2d84ej9el3/nazugofimeset.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/33355a91caa3f7d30bbed61374ffbf8b/jonaxeburupinepaj.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/f7cacffe77e479a2ffb085ae7beeee7d/gugedozajuman.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d549bcfdc1---zedaruxoguz.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878d9b9f714---69491183258.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9323dbc29---55899867934.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1f1ed901c---lizixozebupemexek.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160728b72430fe---xekekivo.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608248ecba2be---jiwawe.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/eh9323otsvpfvfob6q8tg5pi8h/20967414277.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c8bf58651144fb80ab4b85ff38233c59/radijewuve.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/0a8931a1f3d9e08d129c78f94e453087/tusamurazonitel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=alien+shooter+free+mod+apk+android+1
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d017.bin
38c96539f9cb4eefca03cbce3fd8cb086aaf4ec61cab860eb4bebcfe8934d696
pdf-font-stream PDF embedded font (sfnt) at offset 0xD017 5384 bytes
font_01_sfnt_off0000e23a.bin
51d233c763a0e2c6ddae50339e16adb7538b86c4c64570c3385335b006208f2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 12460 bytes