Malicious PDF — malware analysis report

Static analysis result for SHA-256 396221ad529650d7…

MALICIOUS

PDF

75.3 KB Created: 2021-03-12 02:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 77477ae4acc57ad509a6a57e0a3fc68e SHA-1: 3dac48c5d209788e82d7d07cf2389f30ee59f601 SHA-256: 396221ad529650d7baae7ea219e40ba718c232a4b337bf27b140748cbe40718d
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, many of which are generated SEO-style links, and one prominent link points to a URL that appears to be part of a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://dugedepap.ru/strik?utm_term=how+do+you+play+mini+dv+tapes PDF link annotation
    • http://komaxinatobofe.medianewsonline.com/fibowaj.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/63408385129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/ralewoxesikoso.pdfIn PDF document text
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_f1714653b40a41c7b683dae860694798.pdf?index=trueIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_01a0542a9d1848058a21abb6dd5ec986.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/67143687588.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_726c09a66c5a4ffa95d6afd227d79aee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/gujovitevugasabovok.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_bc60c06ae44d4158b13c7fbb75059aaf.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_fbb6c24303bc409a9e3f298ca3feb93e.pdf?index=trueIn PDF document text
    • http://penanaras.myartsonline.com/munkres_calculus_on_manifolds_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c51e390-6045-438a-acf3-e17c4c170644/how_to_do_baby_sleep_training.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/zimegerosuz.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/reporter_definition_root.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/what_is_the_network_unlock_code_for_vodafone.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_c7a7c6a8dc3e4d4180fa93298f5dc3ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b7c451-b73b-4dc9-96a9-67cd9584d3ca/onan_4.0_rv_genset_manual.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_89218912fe1a4cb68a990095a18fdfb2.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_a0b8a57cfaad4ffebfba248937151ce9.pdf?index=trueIn PDF document text
    • http://pevipitoz.atwebpages.com/9678930668.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 5224 bytes
SHA-256: bd57254c6cd03d1921abe0e5a08abf714478cba96c0fc2156350a6d6c5d487af
font_01_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 10600 bytes
SHA-256: 211e1c39a0beb6aa440653d8d86c01f10373ae905b569a1b22c89ea3f66b4e7f

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