Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dccbaa4bf37790…

MALICIOUS

PDF

77.7 KB Created: 2021-01-08 18:33:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c715fcf401a70e7d8559a8ef08b3ed76 SHA-1: 8b338f22fe7250e51deac37c6d6e4ac3017fa31c SHA-256: 47dccbaa4bf377906f069a601a2c743f5a424fe95fa80485db6cb0762d1e908c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating phishing and potential trojan behavior. It contains external links, one of which is `https://trafffe.ru/aws?utm_term=aladdin+2+cartoon+movie`, suggesting a lure to a malicious site. The presence of PDF_SEO_LINK_FARM heuristic indicates a large number of external links, common in phishing or SEO spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=aladdin+2+cartoon+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409801/normal_5ff49b32344e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f8b1a1777f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f87d30c83a8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fcbcbd3cd0d8.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/26464474fd64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fe8d4d16304f.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/84375419-a38e-44c8-9ea0-b4da76d5e454/gifazarugapafuwarejijite.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/vitiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cf9d73-1b88-422f-854a-40dd7ab11ba1/como_se_dice_virosis_en_ingles_hola.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/vuxonuguvepivagaxeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f0d0ec-da63-454b-831b-790f7cf8b545/sosafolakotopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e35dc80-9700-42b2-b0dc-0f32763897e0/bloons_tower_defense_6_apk_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82eb727-c05b-4cc7-866f-c178771a17b9/ww1_word_search_answers.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_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 5088 bytes
SHA-256: e18ba6d5a8a8a4e0ee63aafe1e494f2106ae472c496a260d49542197c08bf18c
font_01_sfnt_off000105c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C4 10736 bytes
SHA-256: a06c545ac0e1971f180b49071c979026a2b885f383c48a4e77db0f38fa3b5397

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