Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e3f6d6a5b10235…

MALICIOUS

PDF

60.4 KB Created: 2020-11-14 03:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee8e6f0396a63a0fdf5455e7ba79f274 SHA-1: 1150ff354b83fa3555fa8ff521d09552f74cf709 SHA-256: 05e3f6d6a5b10235dfd6ef5c5f345fcd595316e58526afc4ad2875a1d11d832a
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying them as belonging to malicious redirector infrastructure and a link farm. The document body, though heavily obfuscated, appears to reference 'ebook free', suggesting a lure to entice users to click on the malicious URLs. The presence of these links and the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=cry+the+beloved+country+ebook+free
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/tikanegan-fapojiwavaf-mejaxevaposok-gujasixetuvel.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/0cbd7f35736ab.pdf
    • https://vadezuposijeru.weebly.com/uploads/1/3/4/6/134660157/44cbdf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa1646bf-5608-45db-ac75-a7ca75fcdd40/visual_land_prestige_elite_9q_troubleshooting.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/bogawekuk.pdf
    • https://s3.amazonaws.com/radubozufiwo/illinois_driver_s_license_restrictions_codes.pdf
    • https://s3.amazonaws.com/kavitokolezub/varilogitofiji.pdf
    • https://s3.amazonaws.com/vuzufexarevima/93425784566.pdf
    • https://uploads.strikinglycdn.com/files/51d164fe-6dd4-4a59-9022-f9cdc9460da0/citizens_fillable_4_point_inspection.pdf
    • https://uploads.strikinglycdn.com/files/34b47864-bc78-4d55-ab1b-b622ea1e48b4/xosajunotatopuxatofuxoxej.pdf
    • https://uploads.strikinglycdn.com/files/ea298c6e-5776-4cab-a1b4-637fcfd025dd/dr._beckers_real_food_for_healthy_d.pdf
    • https://uploads.strikinglycdn.com/files/82263d95-c986-40ec-b7fe-08d686b0f531/fusinububakaxap.pdf
    • https://s3.amazonaws.com/zolerazowubow/popoguwuwusozurovesuna.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_off0000b137.bin
3a095bd3e60a5dd026ea5a14f39b5e0e38452f79121f9258eee65c7283d303e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB137 4992 bytes
font_01_sfnt_off0000c23c.bin
4e5f75de53c09da8d4ef9abf1ee56fcb4313a839a91782643d09ff44f502f36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC23C 10140 bytes

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