Malicious PDF — malware analysis report

Static analysis result for SHA-256 deec626569003b9b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 18:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97cc380fc5064379858a2792d8dd674d SHA-1: a5e58d1f037758491ea95e50418f1503cd33a3f2 SHA-256: deec626569003b9b482123592212f2de7be9a8975db0e2f0712ed10a22dbdd83
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or phishing. ClamAV and ML classifiers identified this file as malicious, specifically a phishing trojan. The embedded URLs suggest the primary goal is to redirect the user to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=pro+forma+business+plan+template+free
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/vimuwuburuwaba.pdf
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/5544894.pdf
    • https://nuresipaxujetun.weebly.com/uploads/1/3/4/6/134683077/c1c2085c736f8.pdf
    • http://rivozuzeno.mywebcommunity.org/how_to_use_the_uniden_bearcat_scanner.pdf
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/a9588ab79.pdf
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/6970560.pdf
    • http://gogovexo.22web.org/how_to_reset_a_motion_sensor_flood_light.pdf
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/5219a024a8af649.pdf
    • https://jujopikin.weebly.com/uploads/1/3/4/2/134265816/figefofabomo_fojegafano_wesuxejogukez.pdf
    • https://resivoviwogo.weebly.com/uploads/1/3/3/9/133987135/tijipinagunujef.pdf
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/b0c664d.pdf
    • https://xogiwudib.weebly.com/uploads/1/3/4/7/134715522/lirutizoju-niregi-zeruzi-rodalinebeke.pdf
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/84858f559ccd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/841c08ea-3c3d-468d-b524-896def3fd1ca/furojasetufarukifirapex.pdf
    • https://uploads.strikinglycdn.com/files/357cb348-06a9-4624-81db-ba42e4466163/gedovojazitasagiguw.pdf
    • http://lanuvurunipa.epizy.com/63729783539.pdf
    • http://kesupipipiret.onlinewebshop.net/brother_vx-1120_bobbin_winder.pdf
    • https://uploads.strikinglycdn.com/files/ed33a0a0-95d7-4da8-8009-aa61015f928f/square_d_200_amp_transfer_switch.pdf
    • http://joriboka.epizy.com/setegegirirozeralis.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_off0000e98c.bin
2bbd8aef5814fb4f0f7838a66d408817bf7b81eda020610d01ae679b325743fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE98C 5188 bytes
font_01_sfnt_off0000fb15.bin
6f5196aa9001ed5a3591f4e3a053451e09b6aaff7d05c4c876a9867739cf8bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 10064 bytes

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