Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c747ceb78d6b1f…

MALICIOUS

PDF

62.7 KB Created: 2021-05-09 23:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd70b60fde1173240357795d364c6703 SHA-1: 45e41b3ed938ab339fc099835d159bbc2fbd6a5f SHA-256: 79c747ceb78d6b1f938c361bda87493f8849a8a84f1271421d893997c5f97267
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress upload directories, indicating it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ffc4ac9ece326ec09cbeeeb7d2b7edf8/49700336552.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/9qcq8sc5a3tu2a7gu95hq64vq3/65753413349.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/b8d6dbaa3deb2946e91dc3b8aaf28d9d/23942296925.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088045bdd8ba---34616172892.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/of8ohl3iimlo6qat66180crtm5/52292383697.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087cae946450---vumasilifajabilu.pdf
    • http://asustainable.com/global/file/muluzom.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9085a3a9f6a51dc44cdc08dddd5b9d93/20448477807.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/5bsj59k82lsdej1bmq2oed8r2j/85736932933.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a4636a858---76992999636.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/121d8e4ca01a4f39dd285f10af174d96/6567752967.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095fefe202e6---22617079047.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/81029408048.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607616dd10bcc---62449068397.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/a4r894e6v5m3gb44urllamvv46/42792236932.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/s08dveelu202mjh8l2eao741i4/75915613422.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc83130f3---zidozu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=biology+corner+cell+graphic+organizer+answer+key
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded3.bin
eb08a8d268c2c31489fed37b47c5ef3b11b3d450bd03d44ff0cacd05c5cf3993		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 5552 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.