Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c56c3335e07dbb7…

MALICIOUS

PDF

68.4 KB Created: 2021-01-01 14:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 750739e2ff9ca550666cf66f9b3e7453 SHA-1: 3cd4d139ee25987e660d59b13a95e410d5212a54 SHA-256: 6c56c3335e07dbb7dfd18f3237a33f3e0803f9ed2d7f91548d816a091ccab230
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'acrylic nails 2020 pinterest', likely intended to direct users to the external URI found in the heuristics. The presence of numerous external links, including one to 'traffking.ru', indicates a potential link farm or phishing attempt.

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://traffking.ru/strik?utm_term=acrylic+nails+2020+pinterest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484633/normal_5fd7cfdfec637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f9250be8cd8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496216/normal_5fb601933f369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_5fd65c6e304c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fce269fd2b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fab7c46c1338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464521/normal_5fd08d60dd155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f8e6092e1c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5f9e3a1212e5f.pdfIn PDF document text
    • https://xekurinesore.weebly.com/uploads/1/3/4/4/134478887/pikijibovojag_ruratevav_famatok_mubowobope.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/bevekizadoxuj/16896048461.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/research_paper_on_behavioural_finance.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/timabom.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/32302825271.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_off0000cebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBF 5292 bytes
SHA-256: 3cf7261a472ea8a5a9973e82595cbbfe9b9e0a61f41b36e5bdbce33927020490
font_01_sfnt_off0000e0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 10760 bytes
SHA-256: cc3f5c47c91c92130e8aef60e3d849ecfb6e166d0ee5be378cab04b3283a360b

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