Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7cc979e568493f…

MALICIOUS

PDF

80.9 KB Created: 2021-01-06 20:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e2541daecf7b746b6a728191371f50fa SHA-1: e770155fed670446733467ff789b557048c8550d SHA-256: 9a7cc979e568493f54fea83959c16d3cf6c11eadda63f0600e1afccce9ccfec5
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious nature of the document. The ML classifier and ClamAV detection strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/aws?utm_term=candidate+evaluation+form+sample+interviewer In PDF document text
    • https://cdn.sqhk.co/gikunixa/Hjgihjf/48828866321.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/D1ijP41/muwimaxuwemitaruj.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/haXhbjh/hungry_shark_world_megalodon_message_in_a_bottle.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/ec340e75-a6ab-4ad1-b045-4b3e85ae17ac/lixizotowuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04fd5e3-8538-429d-a2ce-c1af48ea8681/things_that_start_with_w_in_the_house.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdd81b9-b4b2-4885-bafd-1962ede16c8b/xetifudiwezeniwifajuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acdc7a05-6a74-4e41-b577-3bd66f58a84b/777_casino_drive_cherokee_nc_28719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f4387f-7bf3-4342-a6e9-78a2e45d7b49/68427906918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f853e1dc-a5b7-41da-93f9-1e100ccb7972/curso_de_fotografia_canon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a45ea2-739b-48ad-9b01-0b7a9d746598/kotojabupagos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc3b6bd-3362-4d3f-875f-e2ffd0aa7389/18399210342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063ca1f2-34a9-416a-9ab6-dce542212710/words_with_ea_in_the_middle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e88800b5-06b5-4015-ba99-95791d3a13d4/55317430309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362a66f0-d93c-40fe-9ab2-6a5659d5dc42/46242941987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec179897-320d-4952-99e0-d06271891596/rebelde_amor_a_rosa_de_guadalupe_dai.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 5244 bytes
SHA-256: 6118b8e9b37ec3f1425afc1d1b09a440921c73caed4dd752edcea159771f2ce1
font_01_sfnt_off0000fdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 10388 bytes
SHA-256: 4b726b53e93017832da5b864d0a5f61305ee0fe57d24f01dcd2faa4174ea63ad
font_02_sfnt_off0001215f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215F 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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