Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc1385bad9d1a6a…

MALICIOUS

PDF

75.4 KB Created: 2020-11-27 16:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d6074e41f361f4407dd9e5c2b103e114 SHA-1: aeccf15f4888c28de7350dd0cb478d053e0c5473 SHA-256: 0bc1385bad9d1a6a482b5d29174e91d056890ba3a398452e08f3979520601cd8
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection suggest a malicious intent to redirect the user to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=dallas+center+grimes+school+supply+list In PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/4727417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415537/normal_5f94b01146e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f97c10c20f11.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/ruxawamigogixenot.pdfIn PDF document text
    • https://basafokadu.weebly.com/uploads/1/3/4/7/134706648/6005354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5f9f879acc383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/761981c0-9458-4640-bb84-0ef306d42241/88420711955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f336f1-be42-4c47-9a4d-a594f00b3d10/how_to_save_a_visio_file_as_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90dabc8-7a49-4bd8-86f1-8f89095e97f2/kodalodolukujifikuputowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1594ea3d-1d16-45d9-a896-b3a78a02bb82/bloons_td_5_hack_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1782b05-2f33-4b30-ab42-79ebd6a0e949/earring_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50129d6f-a1a2-45be-8ae7-9690dc8fb605/how_long_is_tonights_game_of_thrones_premiere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6721e23-0662-4ae4-a832-9b596528cdbc/dalail_al_khayrat_urdu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 5328 bytes
SHA-256: 19a11995ded63a7a9326a2c2516d73386dc8f84e5ccd0bb337b67f2ca7a46e56
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 11348 bytes
SHA-256: 05d37067044dbe026dca16011d0a7e4514e23275e0fe60438507f0960339272f
font_02_sfnt_off000112cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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