Malicious PDF — malware analysis report

Static analysis result for SHA-256 c106632c570881c8…

MALICIOUS

PDF

72.2 KB Created: 2020-11-10 07:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6361727d9686cecdacfdbf285f4d12df SHA-1: 9555c87ffcebe0bd58d902eee0aa9640f29e44aa SHA-256: c106632c570881c8e82166df417d96aacfe52600f13e041d7a253e7b6e1f88fa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/strik?keyword=neverwinter+professions+guide+mod+15'. ClamAV also detected it as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'. The document body, though heavily obfuscated, suggests a lure related to a 'Neverwinter professions guide'. This indicates a likely phishing or malware distribution attempt via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?keyword=neverwinter+professions+guide+mod+15
    • https://cdn-cms.f-static.net/uploads/4381344/normal_5f9cfae48c0ec.pdf
    • https://cdn-cms.f-static.net/uploads/4458390/normal_5fa98d91b1b4d.pdf
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5fa7dcf17307f.pdf
    • https://cdn-cms.f-static.net/uploads/4417141/normal_5fa92226387cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woberiz/53368403031.pdf
    • https://uploads.strikinglycdn.com/files/abfc7309-16c7-43c6-bd27-1b448e8ca90b/74490859940.pdf
    • https://uploads.strikinglycdn.com/files/4b88fb81-22ee-4fd6-8fa8-10e5f50184d4/rosufo.pdf
    • https://uploads.strikinglycdn.com/files/6343ca9e-437d-4819-bb05-dedbed06c9ed/kajafop.pdf
    • https://s3.amazonaws.com/libowebujakux/ingersoll_rand_air_compressor_ssr_manual.pdf
    • https://s3.amazonaws.com/zonivezada/69499436999.pdf
    • https://uploads.strikinglycdn.com/files/9ad1ca25-61b1-497e-9f42-48958b5ba505/mp3_app_for_android_phones.pdf
    • https://uploads.strikinglycdn.com/files/033699a0-0c59-4184-91de-d4848c777ebd/sejuzolupelepanotozuxusib.pdf
    • https://uploads.strikinglycdn.com/files/bbb89515-07cc-4951-8377-a478cc759cf7/24249919553.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd94.bin
dcadbdf5a8bd794962570e276530058428814f3ae45f82f57e783f0996a69b19
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 5416 bytes
font_01_sfnt_off0000f019.bin
3a6771eb50203c741c0390e81a63849c49dadd1ecd1d249b1a9ed13a9f352a29
pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 10572 bytes