Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26212a45a83f16f…

MALICIOUS

PDF

94.7 KB Created: 2020-12-28 09:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9cd35a4af66f598e29610b4740ffd30 SHA-1: 118aca0f2e4b1f60da6ec43f4d254db36c42481d SHA-256: c26212a45a83f16f6411b3890566be9a005852a3db6ed3d9f7f0dc61ab75f13d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://gettraff.ru/strik?utm_term=amazeballs+meaning+in+telugu'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=amazeballs+meaning+in+telugu
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fe488fd4f2e4.pdf
    • https://cdn-cms.f-static.net/uploads/4453344/normal_5fd127ec14505.pdf
    • https://cdn.sqhk.co/zazavoxujub/hhjg9TO/voltage_drop_calculator_12v_planet.pdf
    • https://cdn-cms.f-static.net/uploads/4482228/normal_5fb3f2f273495.pdf
    • https://fofevupug.weebly.com/uploads/1/3/4/4/134490210/1262395.pdf
    • https://cdn-cms.f-static.net/uploads/4410694/normal_5f9bd19d0a70c.pdf
    • https://cdn.sqhk.co/xetasenuwoji/ghhjuhc/46246778137.pdf
    • https://sesemuxedewa.weebly.com/uploads/1/3/4/0/134017121/mabaniwijukulafitaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/71c6d7bc-4121-407e-aed6-2eac39ce94fd/blue_pelican_java_lesson_4_answers.pdf
    • https://uploads.strikinglycdn.com/files/cbfbe92b-8baf-4874-9c68-335066c5da8b/85440719328.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3b.bin
0b0cfde94839afbd53b1ae586c10b390735fba292fcb4e8e31f44727c5b48fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 5088 bytes
font_01_sfnt_off0000fd7a.bin
98d4b79ce6ab1a3423164d5f43b30d4577e15bac4153e384a2c09bede09fe9e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 32320 bytes
font_02_sfnt_off000141c1.bin
6d4a9e231f65496cd507732c48c0e2f1c840870708c4a40739b03cd36c757549
pdf-font-stream PDF embedded font (sfnt) at offset 0x141C1 14140 bytes