Malicious PDF — malware analysis report

Static analysis result for SHA-256 082c9d9e2c7664aa…

MALICIOUS

PDF

84.6 KB Created: 2021-03-24 04:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc9774f34a1cb1fb3cc393855d0b3969 SHA-1: 6276e26e66647936abeb0560630ae6710aeb6971 SHA-256: 082c9d9e2c7664aad0e8f64c114a240c9a01a574d2ee64b5a2494b3d4d3932c6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://nipisod.ru/strik?utm_term=federalist+70+ap+gov+frq', suggests a potential phishing or malicious redirection attempt. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=federalist+70+ap+gov+frq
    • https://cdn-cms.f-static.net/uploads/4404745/normal_604edd81b800e.pdf
    • http://golesaluwo.66ghz.com/jolepeximezonep.pdf
    • https://cdn.sqhk.co/jivaduzar/b0GPQgh/rodonepukawaniveka.pdf
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/a3f121b3df6.pdf
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/paledasofawo.pdf
    • https://cdn.sqhk.co/mepowokugo/iakhfLt/healing_crystals_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4411694/normal_6046770b43929.pdf
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5feafd9ea1d7c.pdf
    • https://cdn.sqhk.co/ruzewekafan/cphc2hh/lajulab.pdf
    • https://cdn.sqhk.co/kevejonob/sjfiehE/multiplying_fraction_problems_with_answers.pdf
    • https://cdn.sqhk.co/nufolado/rjgjhg8/marusawitamawubijage.pdf
    • https://cdn-cms.f-static.net/uploads/4369768/normal_6035a9bcad8fa.pdf
    • https://cdn.sqhk.co/kixagixupo/eNpAE8N/babowimefatepunuz.pdf
    • https://cdn-cms.f-static.net/uploads/4415937/normal_602145868dc1f.pdf
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/fotetig.pdf
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/54bcdf.pdf
    • http://savuwit.iblogger.org/71019479883.pdf
    • https://cdn.sqhk.co/sesexibanobu/jboBgd9/download_pixel_cup_soccer_16_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e865541c-e685-4e48-b2cf-c910544d392b/gagane.pdf
    • https://uploads.strikinglycdn.com/files/cfcc2208-8892-42a6-9c31-59f47ba75fec/word_forms_of_fatigue.pdf
    • https://uploads.strikinglycdn.com/files/ee0cb7d5-6526-4c0b-b7ea-982a9758f29d/atonement_summary_chapter_7.pdf
    • http://dujoserowumil.epizy.com/99336822331.pdf
    • https://uploads.strikinglycdn.com/files/e1d7a9b0-35b0-43b8-9120-a6b9ace96003/beethoven_sonata_no.13_op.27.pdf
    • http://jibovofafef.epizy.com/97349760948.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e6e.bin
802fa1d4a81a0fef82326ab3fe8abe43cbbdd8465b10f33b23cab6bac4971b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 5572 bytes
font_01_sfnt_off00012176.bin
68c3036e1d31c2f75fbafc468bfd672c48564b8075e2e025f9f1439d21d8bceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12176 10460 bytes

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