Malicious PDF — malware analysis report

Static analysis result for SHA-256 839270f2b373b843…

MALICIOUS

PDF

62.5 KB Created: 2020-12-01 20:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 600fbed972b0f1058d6d39d877689a1d SHA-1: 7a4a2713bd7e9a241f6a79defba366ddec8455e1 SHA-256: 839270f2b373b8433d1090b9477b95ffdd8f46777eb34b1879deea3de1cd10eb
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least two identified as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, appears to contain text related to a manual, suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=liftmaster+mega+arm+manual In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/4802602.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/fcb8ea6f2d.pdfIn PDF document text
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/23c825.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/mesopafomaf.pdfIn PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/e3c980adb3adcc.pdfIn PDF document text
    • https://mijibetifud.weebly.com/uploads/1/3/4/6/134653630/kojokejeta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/628bd280-2a6c-41f5-b972-6ce7df449700/kotirikelu.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/duplicolor_caliper_paint_dry_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae6727a-79d5-4a34-b29d-453496a95671/5995757032.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/23336697284.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/18149241667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3313d3-c29f-46f9-8ddb-1bbd0147e75c/pokemon_blazed_glazed_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/51168248113.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_off0000b6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FC 5028 bytes
SHA-256: 08081fe7e8b289c4c26fc1018137b77c14e9bad1dc5b401a3b42ba8936bb81da
font_01_sfnt_off0000c805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 11276 bytes
SHA-256: f10e3755b00bd4395739431d20d5aa20fbf2c7f9e2aa2fd8f9715d57a57fd499

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