Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e413bfc5a826373…

MALICIOUS

PDF

66.4 KB Created: 2020-12-19 03:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09e8d80353af79b70badb4df12e89d9f SHA-1: 12596d6afeda1ab0c3db8e5b0fd57c32d3c7725d SHA-256: 2e413bfc5a82637366a1a9fb5ceefc5284ed4d04ea35f9c93553a79fd7106a31
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Oracle sql and pl sql books'. The presence of a PDF link farm and the ML classifier's high confidence score indicate a phishing or redirection attack. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=oracle+sql+and+pl+sql+books
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/gudexagar-zesurexujiluja-zalos.pdf
    • https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/1880411.pdf
    • https://cdn-cms.f-static.net/uploads/4454821/normal_5fa9e19044c66.pdf
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/80e3736b02a2.pdf
    • https://duzikasaropofe.weebly.com/uploads/1/3/4/4/134489835/jebafuleled.pdf
    • https://wazurewimi.weebly.com/uploads/1/3/4/5/134598950/8593216.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fce00145895864d89538150/t/5fcfd91359a6461ba15b5d34/1607457043775/tosatejujirixexakema.pdf
    • https://uploads.strikinglycdn.com/files/1b9e2a5c-137a-479f-9481-b8ee74308d9d/wawiwevig.pdf
    • https://static1.squarespace.com/static/5fc7a2a4f9cd615d7ca8f756/t/5fcbb964190ee82df8e388f4/1607186789175/45618957002.pdf
    • https://s3.amazonaws.com/pasawe/alt_balaji_boss_episode.pdf
    • https://static1.squarespace.com/static/5fc5c384116eb00e3c6d5904/t/5fd1dded071bbc68802c7d5e/1607589358082/retro_griddle_toaster_oven.pdf
    • https://uploads.strikinglycdn.com/files/94933fa9-8b19-4149-b3e3-42cea99a56f8/hp12c_user_guide.pdf
    • https://static1.squarespace.com/static/5fc4c3ca116eb00e3c64bc56/t/5fd67aabd654060362cb7733/1607891628353/zukebofukarolesurukekogew.pdf
    • https://s3.amazonaws.com/figugipopar/cbs_sports_waiver_wire_week_7.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_off0000c639.bin
6419f24d2af8443fbf3aaf677173cf60c551a9f745dea119d107f38c99ba82ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC639 5424 bytes
font_01_sfnt_off0000d8ac.bin
e64119d39289f31a68ee9be2e93f8c58a9b417d5a3464b4b93dbc45a8c668c12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AC 10684 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.