Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3340368751484a…

MALICIOUS

PDF

78.5 KB Created: 2021-02-19 22:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8d67c14d8cb93def70a8dcf34a51f4bd SHA-1: 1894d6d8e0537dc803b2d9e2e8b030f168610073 SHA-256: ce3340368751484add57050808ac3d60bc3a321602e131be3f96096a731b64e8
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests an attempt to lure users to external, potentially malicious, sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/strik?utm_term=amy+hempel+in+the+cemetery+where+al+jolson+is+buried+analysis In PDF document text
    • https://cdn.sqhk.co/sirazisiluz/3a46djc/strategic_marketing_planning_process_begins_with.pdfIn PDF document text
    • https://rujusuxiledajo.weebly.com/uploads/1/3/4/8/134861970/1973b0021bf3ae8.pdfIn PDF document text
    • https://cdn.sqhk.co/banibudofe/hdZLajd/mino_monsters_2_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_5fd92de439dc8.pdfIn PDF document text
    • http://bewepovuzif.iblogger.org/14228578049.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/5633072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_601b04d7562a3.pdfIn PDF document text
    • https://cdn.sqhk.co/romemanir/qaIiiig/apple_watch_airport_scanner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411682/normal_5ffb2dc9b995c.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/gOgeF70/xoxuxolozikiwudanonokegex.pdfIn PDF document text
    • https://metidelesaweso.weebly.com/uploads/1/3/0/8/130813592/bb6e0b6e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/6gdoAYS/wapupal.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/xovekolamoxe/93413542094.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/84000105962.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/flonase_user_guide.pdfIn PDF document text
    • http://dabinuxorolukew.epizy.com/zisukufelenigorugoti.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/dojojukelezuponuraxi.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/petsafe_stubborn_dog_wireless_fence_rechargeable_collar.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_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 5712 bytes
SHA-256: e095bdf64df5f4ced9f20f0a6db0d060513ddc115fdcdaadd769139a73e8d253
font_01_sfnt_off000108ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AC 10600 bytes
SHA-256: fc9ea9c5e223ae4479279e918ebe9af0bd27e9731e40065348a1b72c8edb5aa9

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