Malicious PDF — malware analysis report

Static analysis result for SHA-256 8250fd5a1095edc2…

MALICIOUS

PDF

82.3 KB Created: 2021-03-19 07:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2d1eefd57f48425d60828c30110c817b SHA-1: 68851d4c19a29fb5296b3f08076b8d512efe5589 SHA-256: 8250fd5a1095edc24c35a65c482db638bcd07e151de3f3faa4ebad3b24941683
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm detected by heuristics, suggesting a phishing or malware distribution attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier score of 0.999781 strongly indicate malicious intent. The document body, though heavily obfuscated, appears to reference a service manual, likely serving as a lure.

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://pelibifir.ru/wix?keyword=lg+wt5070cw+service+manual PDF link annotation
    • http://bestrongbyg.com/34654834242w9z47.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/centos_7_linux_server_cookbooko4b0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491969/normal_5fdfa9d35e36d.pdfIn PDF document text
    • http://flathead.us/firogirurikimezusikosidtuln.pdfIn PDF document text
    • https://jajixawu.weebly.com/uploads/1/3/5/9/135992574/9827496.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/razunagetatu-lipew-bodado-sapebatipulamup.pdfIn PDF document text
    • http://bestsalestoday.xyz/84837377244e79th.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fc9f7064c853.pdfIn PDF document text
    • https://nexojavadu.weebly.com/uploads/1/3/0/7/130775828/4b012715bc.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/lakujusitejojet/61739493028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505fcc64-6ab5-4efc-95b5-a5e816badd0c/2005_jeep_grand_cherokee_limited_5.7_hemi_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f73c44-0622-4ed8-adfa-e908e58cd1c4/frozen_jr_script_part_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/43882684444.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/cocoapods_macos_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/raksha_bandhan_songs_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/i_robot_movie_download_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/brandy_melville_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/bunuparabotemigasezale.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/lususisozoxab.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_off0000fe1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 5560 bytes
SHA-256: 4fc2262d791ac071c1e17a1d9eb0a03d22ff8bbaf97ae134d4bd1a210f76cf94
font_01_sfnt_off00011117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11117 12776 bytes
SHA-256: 85f063cd74cc36b6c7740a1c6876712a73818a191bd0a8d5a74f2beba5cf4afb

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