Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f5d66129886301…

MALICIOUS

PDF

181.6 KB Created: 2021-01-16 07:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1bb7039a61a8a8ebb9fb61a638b07c90 SHA-1: df5d99395b6943f47c95c8becd71731efaad4f9d SHA-256: c2f5d66129886301ceb6a3619565da2f6c47fa60b8704bc05d5786858bbdfa6d
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://ggtraff.ru/123?utm_term=what+does+cat%2527s+cradle+symbolize'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL embedded within the document strongly suggests a phishing or malware distribution attempt, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?utm_term=what+does+cat%2527s+cradle+symbolize In PDF document text
    • https://site-1172568.mozfiles.com/files/1172568/the_a_maze_ing_labyrinth_rules.pdfIn PDF document text
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/xofonisonovegopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f889fbb24dfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5fa12d054311f.pdfIn PDF document text
    • https://cdn.sqhk.co/kevemelis/hibWeib/fanigud.pdfIn PDF document text
    • https://site-1171887.mozfiles.com/files/1171887/fish_live_wallpaper_for_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_5fd7cdc50ba56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_5fff14ccbbd91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475729/normal_5fed12a378239.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_5fc3e92e2c49b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/capitalism_without_capital_book.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29202 5520 bytes
SHA-256: f6b6513bd6f61dfb58c2468308f1805f610260129e9c73b6542231b5b3c3efdf
font_01_sfnt_off0002a4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4BB 10552 bytes
SHA-256: dc1c60e9ec0cc7316d5acfe0a6a1375c091f0b0e1fc565cddcec95d609d1fbd7

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