Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c79c1430e4cfaae…

MALICIOUS

PDF

86.2 KB Created: 2021-03-16 09:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 84cf2f0bd84373eab7d2ea4ca77d9f25 SHA-1: 0eaa39cb75dafae1f0a1722af702b6983c26450e SHA-256: 0c79c1430e4cfaaec83cabc03e3dd6778aae983c9b86fd6dbf312f6390a60dcf
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 pointing to other PDFs, which is indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs are characteristic of techniques used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/wix?keyword=beastx+3.0+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408879/normal_5ff522f9345e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_604e1d8495f4f.pdfIn PDF document text
    • https://lifoluzasodani.weebly.com/uploads/1/3/1/4/131437418/3165839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490917/normal_604d0311613be.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/90642340965.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/4001110.pdfIn PDF document text
    • https://fozixaxo.weebly.com/uploads/1/3/4/6/134665632/1674941.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/addressing_modes_and_instruction_set_of_8051.pdfIn PDF document text
    • https://mozibidu.weebly.com/uploads/1/3/4/7/134763316/vogidamiwebasawitopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_e77b1f8163de46f2bbe8ff1797fe3d86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/sewuxenudufi.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/51822676388.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/farmakologi_ampisilin.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/how_to_turn_off_gamesir_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/midamedodizedogagugu.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/avast_free_antivirus_2017_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/buncefield_explosion_report.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/asnt_level_3_ut_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/assassin_s_creed_3_240x320_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/aqa_computer_science_a_level_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/zinirivonidazovibulazeme.pdfIn PDF document text
    • https://58fabbca-0322-4868-a582-948aa19840f9.filesusr.com/ugd/93748c_0fb5626d1acf4038844ea40e82206133.pdf?index=trueIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_3797bbf471104f7dac7bf8e2e21305a8.pdf?index=trueIn 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_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 5192 bytes
SHA-256: cebf350e5b1527f0340626ca472fa09b49f7d791ba35373d8039d4b8194e7558
font_01_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 11464 bytes
SHA-256: 90b9a839ca7783582aaf69895266cd21819b8ae6e2fa6a3ebd7978b73d77faba

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