Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef6a196cd7dd650…

MALICIOUS

PDF

64.4 KB Created: 2020-11-10 10:29:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9f2a48d76b12d7bab55c4bf8d0829d01 SHA-1: 18fe96bc3800e0e5e96a083b145b3f07c25dcc91 SHA-256: bef6a196cd7dd650ef882fbda5b1ef5f954447d80413456db6fa5316b6d7d098
156 Risk Score

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 a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism. The primary URL, 'https://trafficel.ru/strik?keyword=geometry+dash+apk+2.0', appears to be a lure for potentially unwanted software or malware. No scripts were extracted, but the PDF structure itself facilitates the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?keyword=geometry+dash+apk+2.0 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f8bfe297e35e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5f96a1248eee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8c52c93e81f.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/molavosojabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5fa37bb106331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f90593e6d23a.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/f5919fd3191bee3.pdfIn PDF document text
    • https://fatagodudun.weebly.com/uploads/1/3/4/3/134327877/fa91a7146fc86d.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/zasepo/new_york_to_manila_map.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/rasopesoxugul.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/japanese_girl_names_yahoo_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb47caab-7c4c-458a-a60e-304e73db2353/spiral_season_6_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/weitz__luxenberg_monsanto.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/la_danza_de_los_viejitos_original.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813bcb23-1a88-4ce1-a38c-6e234a4649cb/nutebakabunemog.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_off0000bec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC9 5672 bytes
SHA-256: 971f40dc2fe924cee4bbc60622ba505aa290ab85a59b16deef9458935c4e24eb
font_01_sfnt_off0000d1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F3 10044 bytes
SHA-256: 3d20bbe35275b43feeb8dd879fa092ff842ed0035004ec519b409ec78ef15778

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