Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc60033592648639…

MALICIOUS

PDF

76.3 KB Created: 2021-05-07 14:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21050f0e4fb8ab4daae2589c696a7883 SHA-1: b3be7696b5ce87a689a548f5d88585ed2fdaa193 SHA-256: cc600335926486399c1de02dc9e692736c2256e5bd191f227253b5bca3c2ef01
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=sony+xbr55x850b+tv+stand
    • https://zegasapazenavu.weebly.com/uploads/1/3/5/3/135326880/4642361.pdf
    • http://mekomob.getenjoyment.net/todolarizadiz.pdf
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5fc63bb22f419.pdf
    • https://static.s123-cdn-static.com/uploads/4468537/normal_6007213b39262.pdf
    • http://xevamoz.mygamesonline.org/40220032937.pdf
    • https://cdn-cms.f-static.net/uploads/4367617/normal_602b8eb8b3160.pdf
    • https://static.s123-cdn-static.com/uploads/4482215/normal_6001e19740598.pdf
    • https://rajajedoweji.weebly.com/uploads/1/3/4/3/134310645/2436801.pdf
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/1285885.pdf
    • http://ligexekena.mywebcommunity.org/music_therapy_sensory_integration_and_the_autistic_child.pdf
    • https://fivixevovisobav.weebly.com/uploads/1/3/1/3/131380347/vituzupavi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/af75a1f6-8811-47b0-b3c6-76d15c9ba6bb/books_for_dummies_font.pdf
    • https://uploads.strikinglycdn.com/files/94b2f1d7-8974-4fb0-bde5-4c0ef71aa465/bokonikulubazadad.pdf
    • https://s3.amazonaws.com/lewuli/telerezijup.pdf
    • https://s3.amazonaws.com/viwoxuz/92141144792.pdf
    • https://uploads.strikinglycdn.com/files/9d5c5845-fbf0-4383-a423-6611704f9c0a/91448299028.pdf
    • https://uploads.strikinglycdn.com/files/a6a4c12e-4abe-40ad-a2b6-e1ee1f2f7f11/cant_print_invoices_in_quickbooks_desktop.pdf
    • https://uploads.strikinglycdn.com/files/82ba4e49-a51b-46b9-b2f0-9b11dbec00d4/vuvofa.pdf
    • https://uploads.strikinglycdn.com/files/78f51ed4-7bd6-4d63-a717-2ef800f9e441/75698254170.pdf
    • https://uploads.strikinglycdn.com/files/ffb0696f-0b24-4ffd-905b-f5a611889f75/lajeletifopex.pdf
    • https://uploads.strikinglycdn.com/files/4863f6b6-6fb9-412f-bc38-abbb2b1e86ab/59317316123.pdf
    • https://uploads.strikinglycdn.com/files/c20b2e62-4c41-4f11-9e48-30606e957085/32513664568.pdf
    • https://uploads.strikinglycdn.com/files/8f84b821-84a4-44d3-8ebc-64b6d275a796/samsung_55-inch_q60r_4k_uhd_qled_smart_tv_manual.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_off0000eaf9.bin
2730cfab495598fcb234f3c2f3e5b6bda82556ace205f627025e87d53395c64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 5720 bytes
font_01_sfnt_off0000fe8f.bin
da7fd80df1b990a48b0a06a0dfdba3d455698405bce6cf0691b2bc08c1e97f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8F 10880 bytes

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