Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fed1f01a8cc9d28…

MALICIOUS

PDF

65.8 KB Created: 2020-12-17 00:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ad1b9916f932ced2fd046f817075347d SHA-1: 15c6d8b7edd0ca188b04ad9e975cb516de226761 SHA-256: 7fed1f01a8cc9d2871018223a27442400be4ce6cd38d76840a343cf81ebfc911
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The primary malicious URL identified is 'https://trafffi.ru/aws?utm_term=sample+foreign+credential+evaluation+report', which is likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://trafffi.ru/aws?utm_term=sample+foreign+credential+evaluation+report PDF link annotation
    • https://xoretesani.weebly.com/uploads/1/3/4/3/134315313/perepunu-kafop-gigoratita-zaxuzuxegu.pdfIn PDF document text
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/5943155.pdfIn PDF document text
    • https://zabivavisona.weebly.com/uploads/1/3/1/4/131452967/zaliwifadutad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc551856609fd0ee7aecdc2/t/5fce209605ddc9599d4a5ac0/1607344281580/budafutodefofuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6794eb7-61ff-42c8-921a-cfbb6f69615d/65740074258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50cdcc5b-1d89-461f-95a2-5775152d6899/elon_musk_by_ashlee_vance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98247fe2-3d63-4549-a952-c221d0e14ad5/manual_de_visual_basic_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2cebdf-f6c8-40ef-a7ef-d230a6b726d2/jikulofeputodom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf66072dd96f5918e70253/1606379016471/neopets_paint_brush_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/vumitawisadip.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/alexander_tamil_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e128e9-11a5-406f-aab6-854edf40d048/jomazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1fe4d3-3cd9-4350-b618-146bb08e1037/purotumujujexedurave.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe7e212facd59cea75dab/t/5fc13f627acac6192aee6795/1606500196619/xizopejetoleg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c7e341-50c3-4a5f-be48-210427b701f2/kasam_watch_online.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_off0000c4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C7 5460 bytes
SHA-256: 8ded8f05f344f92ee47ddb30ac2856ae2f9d2748d9131a401e86d888b01c8f51
font_01_sfnt_off0000d747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD747 10420 bytes
SHA-256: 4a93856db157b4e2639308dc5ac04e66639779458324934a4acf69f84e8ed07d

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