Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1f8ae0533c951a…

MALICIOUS

PDF

128.2 KB Created: 2020-12-22 10:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 656c59ed208babcb82fd0ddb1ef55afb SHA-1: ebe778fc27ea4e61a5609a2f19c1b96d245dc141 SHA-256: 6f1f8ae0533c951aef5efd4cddcf6742066cdb4907f9b9ab93e4e5dd1407e69c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF link farm', with the primary URL being trafffi.ru. This suggests an attempt to manipulate search engine results or direct users to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://trafffi.ru/strik?utm_term=green+alien+dancing+hop+beat PDF link annotation
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://popekuzukije.weebly.com/uploads/1/3/4/4/134471955/236509.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/sojuravewi/53270700296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a975396-39b7-447d-94e7-b7e0e441f5e2/kizatijiwazog.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/powerpoint_templates_for_finance_presentation_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3045d0-8621-43fd-8db3-5071a15e880b/94883689444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a7a880-3fb8-478a-afae-33a2613ab832/yamaha_48_volt_battery_charger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/adda247_app_for_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90452428-fc45-43f9-8756-a7ff17ff3ba8/logumik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f25a67-1633-4c59-b642-7cbccc7df5dd/kreyszig_functional_analysis_solutions_chapter_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4d1569-eff3-49e8-ab43-8a1ce0aef752/pibonomoweviwagem.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3FC 3744 bytes
SHA-256: 97e65f2deb623ae97ecf23da1d93420c8ef58a18f55b6bb75539c1d7b759534c
font_01_sfnt_off0001b16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B16E 5328 bytes
SHA-256: 210486c64889c9ae94a74e0233dde728cd4d2b6ebf532c9fd9993fc6cc2cd176
font_02_sfnt_off0001c379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C379 2196 bytes
SHA-256: c1853c8322779ff5daaeffd7120f162f32952a7adcc7fdeba602068783d6c175
font_03_sfnt_off0001cd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD78 10948 bytes
SHA-256: 939a6cf6a38f398c1e90ce45ba0a4c0697a26ed243b300b29b703916ba744924

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