Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7da73457b4fe755…

MALICIOUS

PDF

76.5 KB Created: 2020-12-27 16:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e5374b2a170e4b2382b47692b6cb613d SHA-1: 842e8c4b0a05e204cf881efdbf514695e205a3d9 SHA-256: c7da73457b4fe7556ed510fc841fdc865d7766bd4aabb6253b30bd1c6832283d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is further corroborated by ClamAV detection and ML classification. The embedded content, though heavily obfuscated, suggests an attempt to trick users into clicking the malicious link under the guise of downloading movies. The primary attack vector appears to be social engineering via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gettraff.ru/aws?utm_term=latest+bollywood+movies++mp4+hd In PDF document text
    • https://dapeborax.weebly.com/uploads/1/3/0/8/130813135/viduvamoko_fajupekudu_tadujoxuralek.pdfIn PDF document text
    • https://cdn.sqhk.co/kinirebuseva/gesjcW8/kujagesifonizopowivopon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473642/normal_5fe10593a0a99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fcdf938122a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368758/normal_5fc631b611b95.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/58c20e6f-02bf-4b8e-8f32-f809be449ac8/sisoxariwipos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a245ef5-0907-4069-aaf7-56a00f823fbf/nonepobanun.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/excel_exercises_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/import_data_from_csv_to_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/50099373978.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_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 5208 bytes
SHA-256: 9b5e61a97dad1478004a79255b65277a51e5933b75c77f57ac18fb8fa351fd54
font_01_sfnt_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 10112 bytes
SHA-256: 65bb0912743f02e703fe3ff2f44b30764a1e25fb4c6f17085bf009807aa01dcb
font_02_sfnt_off00011728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11728 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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