Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17a951cd975c5d1…

MALICIOUS

PDF

78.5 KB Created: 2021-05-19 16:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b9ccba4ecca95c4a82fbb49dcc6686ba SHA-1: a48015d4eb7d4989bfd127d3aa198e963830b6f7 SHA-256: c17a951cd975c5d1d83e9937cfe569294614fc438cd705a06ce287df529dd9b1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a phishing or content distribution scheme. The embedded URL 'https://dugedepap.ru/strik?utm_term=is+there+any+alternative+to+adobe+flash+player' is a primary indicator of this malicious activity.

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=is+there+any+alternative+to+adobe+flash+player PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445739/normal_5fd3a9b291242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_6064ab9253e2f.pdfIn PDF document text
    • https://tixuxajus.weebly.com/uploads/1/3/2/6/132682254/lesenitapa-xeboxupix-lipivosep-tuwefudoxol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5fef0d539a6cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454171/normal_6002862574ad5.pdfIn PDF document text
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/7201284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_602d4d537945f.pdfIn PDF document text
    • https://kebopudej.weebly.com/uploads/1/3/5/2/135298692/8871179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_6069cedd3d798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_6043927611e68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_5fe187ac36f44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f38201-159e-496f-8eac-34403ed2e799/does_samsung_nu8000_support_dolby_atmos.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/muvoluviwatesufetim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0020142-a3b9-4cab-8242-bec725875e1a/how_to_reset_f9_earbuds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a19dcbb-22fc-4fce-8a17-18a22757c090/41825732367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adec2b24-b42f-43b0-949f-f362d446576e/the_house_on_mango_street_intro_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff36b167-a985-4555-9dfc-2cb9b16941a2/john_deere_250_skid_steer_quick_attach_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7ce318-96f0-4f5f-8d57-587f7279ae6b/zodinesagorugawugimo.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/essay_topics_for_isc_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb3fa0f-0141-4b4e-b55b-912632e902b8/19718823653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/195ea786-1223-4470-9520-c047c162dfc0/ziraxofel.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_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 5368 bytes
SHA-256: 614874ce86dd7a66f1e83d655dbc0eaef0dc3ee1df9ed4e8bd2d6742cd2e4bba
font_01_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 10888 bytes
SHA-256: 4bf79a3990593d023577fefc68d78d73f71129eeab410dd1471257bfa2e3f0db

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