Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edb8cbc1b81c07d…

MALICIOUS

PDF

71.3 KB Created: 2021-01-12 00:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 77fa2591797a49fecab11745ede47edb SHA-1: b7514bbf0f88597617030d1f7bfab67ad5d40e5c SHA-256: 0edb8cbc1b81c07d4dc235fc2ad970ead3fcc733f5bae84c255ddc3ab94c963f
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with a critical heuristic identifying it as a malicious redirector link farm. The document body, though heavily obfuscated, contains text related to 'spoofing pokemon go android', suggesting a lure. The presence of embedded URLs and the ML classifier's high score indicate malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=spoofing+pokemon+go+android In PDF document text
    • https://site-1168340.mozfiles.com/files/1168340/used_nitro_rc_cars_for_sale_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/aqkcgdO/lodul.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/jamewugup.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/pezofut/hack_block_city_wars.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/xelovatuxirufunirakufox.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/annual_income_tax_form_1700.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/blouse_ka_design.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/63193312557.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/data_mining_machine_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/25080228108.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/zakorixobobe.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_off0000d9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D9 5320 bytes
SHA-256: cf4bba2a5a091a980ce6d11353cfbb78c6bad65194a1bc3e8cf2c7e2bdcf19f2
font_01_sfnt_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 10840 bytes
SHA-256: cefcf3d2494ec8f4b7939a71a798171901d0dc02b66874a408f38aea4e79e9fa

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