Malicious PDF — malware analysis report

Static analysis result for SHA-256 1021eedf5beb787e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-26 09:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a249df3195aa3b72f222d881054d3a0b SHA-1: e6ee48bc7b454e9287235d48db8b06e4f9598564 SHA-256: 1021eedf5beb787e0efd9e06321d10dd2d02f052fc1b4d52a762440bd1e6a5e0
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious content, specifically a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to direct the user to malicious websites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/123?utm_term=cricket+tournament+form
    • https://cdn.sqhk.co/xutazazo/gl1hJIW/pixel_gun_3d_mod_apk_unlimited_everything.pdf
    • http://berozabekep.sportsontheweb.net/cheikh_ahmadou_bamba.pdf
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/jofutiw-toxiluzi.pdf
    • http://seweripuwas.mywebcommunity.org/how_to_prevent_coastal_erosion_in_louisiana.pdf
    • https://pipulelinukebe.weebly.com/uploads/1/3/4/3/134364851/5245680.pdf
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/4465178.pdf
    • https://bidekefit.weebly.com/uploads/1/3/1/6/131606331/5d3279c1b6.pdf
    • https://cdn.sqhk.co/livukigelo/OMfhcjj/90974561197.pdf
    • http://norikaloro.mywebcommunity.org/vabivigo.pdf
    • https://cdn.sqhk.co/jarixizotib/XOrF1ia/gakuvijefotofose.pdf
    • http://fonexewof.mygamesonline.org/soda_reader.pdf
    • http://rakapugijumub.sportsontheweb.net/zogizuxuvuretuvafufokex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_87b2824f3120435eaa635a29bc606533.pdf?index=true
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_bb88f9c773994e40ae13166f4f7d6a8e.pdf?index=true
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_32ea0330ceb64a1b908fa999b03d4436.pdf?index=true
    • http://lonesopuw.onlinewebshop.net/57521218020.pdf
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_fe46c2a3ac1d476286b551588e3a683a.pdf?index=true
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_e208b1e8f84e44f8bd4bdcd54f923935.pdf?index=true
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_0bde7f055980459d8cc7481696cdf691.pdf?index=true
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_375877b459e4401f8c418706f9900629.pdf?index=true
    • 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_off0000e3de.bin
e4b375512ef51c6c581f2be24ecbae92c8bc5cb05093e50be1e31d34f8bab842		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DE 4784 bytes
font_01_sfnt_off0000f415.bin
9d9fa5004c6ef4b5a21f63bbf0287f011734d262e0d79be110fca9378aea7f55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 10728 bytes

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