Malicious PDF — malware analysis report

Static analysis result for SHA-256 1017f2e5a46f6684…

MALICIOUS

PDF

83.4 KB Created: 2021-04-16 07:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cdc017a471e28ccb41efc72b167f0cd9 SHA-1: e61536ff92f9242288a2a6456fc964e4b6163ff3 SHA-256: 1017f2e5a46f6684019d652b8d388e8f7ffb7fbaac4ae333cf264f7ba69a3502
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to popular search queries, designed to drive traffic to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=how+old+is+kaneki+in+tokyo+ghoul+season+4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496818/normal_60072828f27f3.pdfIn PDF document text
    • https://verulofu.weebly.com/uploads/1/3/4/0/134012380/8502253.pdfIn PDF document text
    • https://xaviguvugunaji.weebly.com/uploads/1/3/5/3/135313722/sujixilinosub_novadut.pdfIn PDF document text
    • https://dotudamel.weebly.com/uploads/1/3/5/3/135326114/dowesafajimawireg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5fef812373557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_6061a18dc3ca1.pdfIn PDF document text
    • https://fadusibolene.weebly.com/uploads/1/3/4/0/134042843/4576731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_60209f719d745.pdfIn PDF document text
    • http://japisonaxem.22web.org/73944174682.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/zulezov/pregnancy_announcement_templates_free.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_e4a298942bb1447ea85a26c363817f18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/what_are_the_4_areas_of_learning_of_the_curriculum_for_excellence.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/31562654664.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/3403110653.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/colombia_address_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/black_ice_r6_ps4_controller.pdfIn PDF document text
    • http://bagasukozu.rf.gd/gemazotedupoxogewudog.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_12b9f7fda7c64076bb9bca18afeca3d0.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_3fb89101bdc9435a9419ccb42b721268.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozaponi/where_she_went_wiki.pdfIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_0d6b883f4101415a8034e1afe162c04b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/ashok_chakra_hd_wallpaper.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_251e9b349596482e83ac0d9770571b05.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/acrobat_reader_pro_11.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_off000106c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C3 5300 bytes
SHA-256: 0afad8135d9f3fc6f94567a7a3497bdf6840bfff7c54efb227dc7deb0f27a06c
font_01_sfnt_off000118e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E3 11128 bytes
SHA-256: 091a272775cf2d3e483342d354cd9d73a4970c7f70c4bea7d4fc55611657850b

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