Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc2cdae141f3dd0…

MALICIOUS

PDF

86.8 KB Created: 2021-06-25 17:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f41e5db675b6f4d6e397b03034515c1 SHA-1: 0d1a268804f6b8f9b5890a24657f9d881a57e94e SHA-256: 6fc2cdae141f3dd0fdb775951af686a042269cac74e4e04b75d1cb5cb7d8ea60
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm that redirects to multiple compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to malicious content hosted on these compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/80338a68102f12c497ddef4f915e0b56/90160699269.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/2dc7c1bb9b34d315fc5e3b30140da11a/61068206916.pdf
    • http://pogservice.ru/userfiles/file/30593156970.pdf
    • http://auxerretv.com/content/public/file/tamurenejixoregedib.pdf
    • http://unesco-mediain.cz/fckfiles/file/72301851393.pdf
    • http://aj-logistics.com/stock/userfiles/file/16803836024.pdf
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/75689969231.pdf
    • https://tempatpasang.com/contents//files/bixugivu.pdf
    • http://sunjewelsonline.com/userfiles/file/zifot.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47bb3204eb---zonozuwewawixejimibufipo.pdf
    • https://newtech-utm.pl/userfiles/file/64208764118.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b10e315aab7---wupavevapotewi.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/xebalavutew.pdf
    • https://aartipalette.com/userfiles/file/jimanok.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62d00a2b07---10214740136.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/k47shf265r314m2373i6mjd7os/68203437334.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/q4bt55in9obg11p744t1bon2id/xajimepukuvavizi.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210625170851.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075496e52725---95410613828.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e97739893f663d29214564ef253b64c8/22542029014.pdf
    • http://energy-labels.com/userfiles/file/37392974233.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714db4d54bc---junuk.pdf
    • http://beautybybelief.com/admin/images/file/33747086833.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/74156383425.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/65412a4f2b48e31c59f722b273ab4eeb/tukejarepozazizubonise.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9saqfrp5bgetg1n4i8cmnjun61/xutor.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=relationship+between+subject+and+verb
    • 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_off0000f0e9.bin
96d04240201fcaa0baed26be21716f1b1e48398a8aea33f4c0d89a0fb9486a46
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 16676 bytes
font_01_sfnt_off00011c35.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 16792 bytes
font_02_sfnt_off0001344c.bin
e2bb157be8cabe628a902bd2e71895ca1c37c5ba7737cb3f6c5f821b25186969
pdf-font-stream PDF embedded font (sfnt) at offset 0x1344C 11176 bytes