Malicious PDF — malware analysis report

Static analysis result for SHA-256 88883eb1135970f3…

MALICIOUS

PDF

81.8 KB Created: 2021-03-21 10:24:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65eb0aa0a4add17c19beb04e7d5e84a4 SHA-1: 794bb3ae354de43dd919b66e154c282955118dc9 SHA-256: 88883eb1135970f3ae70582d07f8132a176a01ab278620ea2b8f19e83b94390b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text that may be intended to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=sat+1+practice+khan+academy
    • https://cdn-cms.f-static.net/uploads/4403820/normal_603b20d84b275.pdf
    • https://static.s123-cdn-static.com/uploads/4428052/normal_6000b2c1b6cc1.pdf
    • https://cdn.sqhk.co/toxodabatot/j90V20C/kiwajekoni.pdf
    • http://fabifux.22web.org/bomadotububebik.pdf
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5fde524387e07.pdf
    • https://cdn.sqhk.co/wifinalimow/ajahcgj/viking_electric_hammer_mill.pdf
    • https://static.s123-cdn-static.com/uploads/4498404/normal_5ff956f70779a.pdf
    • https://cdn.sqhk.co/zasokolof/6c8vQhc/shogun_hibachi_grill.pdf
    • https://cdn.sqhk.co/melipetoluf/cjbgfBb/tree_team_inc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8f109f84-165a-4212-b82d-c4147a7505c8/the_seven_spiritual_laws_of_yoga_a_practical_guide_to_healing.pdf
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_c8bef492d82c40c286024badf69cfc1e.pdf?index=true
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_947c6b8c63a048c3b5a1c8bc8f67874b.pdf?index=true
    • http://gapafux.rf.gd/neither_nor_either_or_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/8f5fec91-9387-457a-be80-daf7b718ed36/91889980237.pdf
    • https://uploads.strikinglycdn.com/files/2eb7e4fc-55c8-4796-a485-3003c1dfe58b/how_to_reset_polk_fr1_soundbar.pdf
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_2893ca063b894f399a60b66bb47b134d.pdf?index=true
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_9b5143ee15ab4995943e0e555a2aeb95.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d78a200e-283f-41ff-9eb9-afa32c7a87e7/kolisala.pdf
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_d614714656a845ef8e9e0078e4fbb73a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2e00d323-0cd2-4348-ae0c-ac10fda429e8/twilight_saga_full_movie_online_free_watch.pdf
    • http://rakemexovujepez.epizy.com/1334167532.pdf
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_630ecbd733444deba64793dbb1e46dd5.pdf?index=true
    • http://bupagaruwizuzu.epizy.com/carb_cycling_diet_plan_bodybuilding.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_e0bb04086db94fe2a063a69339469eef.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_off00010169.bin
6a8ba99117170697f50002a86e92e3cf1381207cd69b3dfb90a5ef35f0aeb562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 5424 bytes
font_01_sfnt_off000113bd.bin
f028b2518010793a2db01797e34f305a2ca47958c00bae1010a85bc323a7a563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113BD 11088 bytes

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