Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf121c2cac49895…

MALICIOUS

PDF

73.5 KB Created: 2021-01-06 07:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 328ac3f625140caf6a9925868bdfb0df SHA-1: 386aae5b3defa61fc879ff1279eb6953913a2c89 SHA-256: bbf121c2cac49895723253e67d0f55cba3bde33e01c4d7fe3b668f772d79b6c7
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of numerous external links suggests an attempt to leverage link farms or redirect users to malicious content.

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://traffmen.ru/aws?utm_term=spring+constant+lab+report+phys+1007 In PDF document text
    • https://nokavapeselodes.weebly.com/uploads/1/3/4/6/134638024/kexakipinafakejexege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f927d03491c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_5fad49fed5f4d.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/9e961474-1e30-4a51-b45f-4a6f34d84946/xutolezudazigijepupix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2c511a-aeb5-4cfe-9e3b-d248a2530f0c/rapedojefoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41514bbc-968d-4047-acf8-db63bfc5aa7f/damefagupejij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a01ee3-f5c3-4d17-8696-497614268738/siguzotavetiwoburemamuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e041132d-4296-4f19-bb28-78113054508b/bozirajitabifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ec66ff-d7af-4119-b2da-52b3328a56fe/15408473095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c003f3a4-42f5-41aa-832e-3574e4565405/age_of_empires_conquest_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927a062e-081a-4722-ba2d-aec335622167/nuxapisojipelizatotofugif.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/pomada_de_barbatimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed77c7e0-6f6a-4edb-bc96-9672d77b6eb0/56911703640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bec6ad7-fe9f-4817-9b11-638b25fd8f5d/97085362922.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sogoniloxejuriwofufu.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_off0000d08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08F 5600 bytes
SHA-256: 273b08e83299a961d6a7bfb510bd977a5951e48ba5a4729aa3ee246b6886db62
font_01_sfnt_off0000e396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 11696 bytes
SHA-256: 6a99d52bfa70a773494c1bd71b75e2d8b62b96cc21284acc8d184028830b201e
font_02_sfnt_off0001093b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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