Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9aea8c2b9cb2a7…

MALICIOUS

PDF

69.1 KB Created: 2020-12-21 13:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 67a32b06d7d509a9b02d9a1f90acd2e4 SHA-1: 803f19dd5fe1640ad9bfafd68c69eee1858895f3 SHA-256: 9a9aea8c2b9cb2a75f0ea4eaffd7392f019dae320d123e5acbb2c39e52b3fd6c
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying a malicious redirector and a link farm. The primary malicious URL, 'https://traffine.ru/strik?utm_term=battle+for+wesnoth+android+review', is likely used to redirect users to a phishing or malware-hosting site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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=battle+for+wesnoth+android+review In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383801/normal_5fcd6616b98fe.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/47447b1e13d6.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/1611925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5f9f1912c1e09.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/e846ee74-e29c-46d4-8bba-e38b09fd9952/root_locus_matlab_transfer_function.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6fa92088997336171c3a/t/5fd659d20f11661d4c2a74a5/1607883222420/man_u_vs_arsenal_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/tera_ninja_guide_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c445b7bc966055df433/t/5fdd3cbba478394ebc858716/1608334523748/dafijedosirozalamobadul.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ethiopian_history_books_in_amharic_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc405c93570fb44d1803ae2/1606682058043/puliwisizibagurok.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/npo_annual_report_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79dbf58f-9c5e-4e02-a6a6-77805b13f2f1/lajosilefego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/274075d1-abaa-4fab-8dcc-18663687f616/usmle_step_1_first_aid_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/51131667875.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf7b2b9ec03672fa6d5d6/t/5fd1e4727cf94534dc5dc4ed/1607591028431/vomivev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c8b62bbd74065805e346/t/5fc754b0a3696915e223383c/1606898867003/color_block_vans_outfit.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/72291114495.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_off0000d052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD052 5196 bytes
SHA-256: f4a29a37dbb02b48b519ac942bf1a884b02b2edfcf25b9b10cbd31c792e47021
font_01_sfnt_off0000e210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE210 11076 bytes
SHA-256: 946c6c306d80d7b37081222e10eac8c764507e1706a156dffb606ae98f607a07

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