Malicious PDF — malware analysis report

Static analysis result for SHA-256 4963527513f6c893…

MALICIOUS

PDF

74.9 KB Created: 2021-01-01 04:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aaf3db8c8e70e2bb25b3e3653e88c122 SHA-1: 07fe2dad78177b55ef49e671b2b821bb3831cc0d SHA-256: 4963527513f6c893b2701671c5b04e67670aabf95fd6685eeb6c32bd8b68e4cf
164 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, exhibiting characteristics of a phishing or link farm attack. It contains a high density of external links, with one pointing to 'trafftec.ru', suggesting a potential phishing lure or a mechanism to distribute further malware. The presence of urgency-related text further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/strik?utm_term=podcast+app+free+podcast+player+fm PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376619/normal_5fdd9be79942f.pdfIn PDF document text
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/mupejerotekako_xopetej_rapuraver_jeguranigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_5fa2dcda4a677.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/8659590.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/mupukesunobaga/menogakowaruwogapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d7e0ea-8b80-4da7-92ce-6cfed414c4e3/71047781897.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/spreadsheets_for_beginners_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab760ee2-70eb-4901-9559-6b25a4466846/78754350844.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/gingerbread_man_template_to_print.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/trigonometric_identities_list.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/88179584076.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/welatamol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bedc22-86f9-42e7-a786-cae6249a1308/blank_timeline_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/planetside_2_harasser_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/centrosema_pascuorum.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/dajelafilaberaxofinorudaz.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5404 bytes
SHA-256: 70ed6c1fc452e5566ceef999f99f1a0e6dc97a69d5349ff3ef69cdfa5d3c74e7
font_01_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 11760 bytes
SHA-256: dd5169408dadf40e1cc7e159626bd0d40ef0d97f82b2775ff005b6205c66fbf9

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