Malicious PDF — malware analysis report

Static analysis result for SHA-256 351d65ae41b02b98…

MALICIOUS

PDF

85.0 KB Created: 2021-03-29 20:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2cc5bae188488119c96f4befe6f451ef SHA-1: 47f966e90695c80b47d0badaed2b2e99ab4e136d SHA-256: 351d65ae41b02b98c31c906c26dcd6cecffcbede6894009655b1f7d4613a1a2b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to investment agreements, which is consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=simple+investment+agreement+between+company+and+individual+in+india PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462075/normal_5ffb11fdcb0fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382771/normal_60037e6953cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_603568ae8b798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_60102a4d6b8f7.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/9Miboia/5529256396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495988/normal_5fc8054cc22b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419425/normal_5ff17500f2b6d.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxolusufa/dmcCMgs/block_puzzle_2020.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/xakegetofonigokarulu.pdfIn PDF document text
    • https://cdn.sqhk.co/padezeda/jiieidU/81851261426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_604b871f4979a.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/scag_wildcat_parts_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/dfnggPc/creative_thinking_skills_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_60502ba07c022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_605304db2408f.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/hj7ibid/top_up_my_phone_ee.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/hiiioET/vugoxebeligutaxazazub.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/iaHhgrz/danny_boy_sheet_music_musescore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_6039fb253a5b5.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/hd8oZgj/40680523831.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/b5jfeig/gokawawumefuwojedurof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_d82a7a7fa5b34cde9a6285e498be91ef.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_40c37a18ec0443ca9a24d5845f3f8f94.pdf?index=trueIn 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_off00010998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10998 5888 bytes
SHA-256: 31ce1ed5210b3b89ed6a223ef47bf68ca21aaa374b1838ebd3b2fe660c3d3e85
font_01_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 11116 bytes
SHA-256: 71b81bf699487ab6e336f428b86cda2b059f3a17785587e660314e1535eb10eb

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