Malicious PDF — malware analysis report

Static analysis result for SHA-256 549470edad9b59fb…

MALICIOUS

PDF

64.8 KB Created: 2020-11-17 17:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b75aece9f6b41807b062cf08355193 SHA-1: 1be68a899ae21a223e1b511ea018a8af8e2e0287 SHA-256: 549470edad9b59fb657ef4e6ad6903f45f6aa5056026b7ad2cf209edae20607d
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for phishing and redirecting users to malicious sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?utm_term=tensorflow+for+dummies+pdf+free
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/1884451.pdf
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5fa26a6630cad.pdf
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8a24398175b.pdf
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5fa7a98920e6d.pdf
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/3ddf373cc9bd.pdf
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f9678e6e08c3.pdf
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/65952b53-9021-4a6d-91b0-52eaa6184f94/7894096486.pdf
    • https://s3.amazonaws.com/gomakobez/pool_ball_game_free.pdf
    • https://uploads.strikinglycdn.com/files/abc399b9-d907-4f3a-936a-b861a21a68a1/luella_high_school_demographics.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_off0000b64e.bin
a05a7dd3d50b832e0b2a480cd72383f3d5848a54f6231bbce289ee35bfbbb2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB64E 4820 bytes
font_01_sfnt_off0000c69b.bin
e2422d9ba8b964b34c87eefa9a9dd1976cec17a40b482420df08c604e8ad3f56
pdf-font-stream PDF embedded font (sfnt) at offset 0xC69B 9876 bytes
font_02_sfnt_off0000e896.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 4324 bytes