Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a049f16774e280c…

MALICIOUS

PDF

70.9 KB Created: 2020-11-28 00:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 47930c1424bcedae433e3d5d4c24bdcc SHA-1: 905445f178e6955d45dc83d5d3978a846798d168 SHA-256: 0a049f16774e280c6e97d8d871b3698420b6631ea40c147beb4f2e406090e85c
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF URI pointing to 'trafffe.ru' and a PDF link farm heuristic suggests the document is designed to redirect users to external resources, potentially for phishing or malware distribution. No scripts were extracted, but the overall structure and URL firings point towards a phishing or spamming campaign.

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://trafffe.ru/aws?utm_term=big+bang+theory+physical+science+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409250/normal_5fa344bd44361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f9aee04ce6e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_5fbc6e704cc9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_5fa639298c261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_5fb30c6dc5166.pdfIn PDF document text
    • https://meverofukibax.weebly.com/uploads/1/3/4/6/134620555/jabimirat.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/pibabopuduj/tactics_for_toeic.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/65546652664.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/zenulofefafegib.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/bbq_pork_ribs_nutritional_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6c89ec-7fd3-4266-a3ef-9c2b47000d79/7231748282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e0e1dc-d7b3-4094-8186-00ea2dcfc9e5/jekelidaxitezeli.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/liga_de_quito_copa_libertadores.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_off0000d81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81A 5708 bytes
SHA-256: c2401df986a850271a2c363eb7cc78194159e91e6614f49c0c44252de3359835
font_01_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 10244 bytes
SHA-256: 8409d45b5e773ff0de0362f6a9755bd2c462d01b39c2a77492136024c2345d5a

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