Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcd8c52e31974c0…

MALICIOUS

PDF

62.4 KB Created: 2020-12-07 07:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 57321439c6cb13d0b7169668c39c0c38 SHA-1: 475c5d1a3df4eb87a83353e760c5fe9368abaefc SHA-256: 9dcd8c52e31974c069327e054b5f9d61ee0cf078b9af209021b935b1ab8f6215
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=2013+gmc+acadia+navigation+system+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393488/normal_5fad904a56b13.pdfIn PDF document text
    • https://jolamaripewefof.weebly.com/uploads/1/3/4/6/134655052/48a874e0.pdfIn PDF document text
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/c661e015a4e840.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/vodikaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2cae0c30a162e0c5ec24a/t/5fc64fc8f8cdb769c6ba85a3/1606832074000/urgent_care_sunrise_hwy_west_islip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfcaad334513fae422692/1606220970746/32177935855.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd36dc04971d5155d5af7d/1606235869077/18027787659.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/chopsticks_waltz_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2fd6b97992eb55c026f/t/5fc157e3eaf37e3b64ce3695/1606506468126/four_steps_in_the_perceptual_process.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_off0000b494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB494 5720 bytes
SHA-256: f278adaa06cdbe462a6a6363e5e0dab35d9cc5d0876be1f5f6782178bd5c36a1
font_01_sfnt_off0000c805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 10280 bytes
SHA-256: 17ce0f3e1a4e2620aa289f084002201da8948be7feb4c06888fa77f02427bb47

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