Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c98ee62a67198e9…

MALICIOUS

PDF

86.4 KB Created: 2021-04-09 08:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d67e9580f91e6c11c58c715c3d06587b SHA-1: 197c9c34e140031c857bd5b7cb46afcf097cb1c9 SHA-256: 9c98ee62a67198e91bcf26a90e00cf0f32d5043e0c31b68132f76919e2075f17
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and the presence of external links suggest an attempt to lead the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://jacksth.ru/strik?utm_term=list+of+english+verb+tenses+chart PDF link annotation
    • https://zurejekivob.weebly.com/uploads/1/3/0/8/130813755/nawawug.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/d7jfxia/80152984425.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/kasosagapuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/9ibWmfo/bubble_witch_3_saga_download_free_full_game.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/kyibifD/mavaduseritejegaze.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/b3HIgf3/wuzebaderumepotejuxu.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/wabuv-dopiw-wimikifowexup.pdfIn PDF document text
    • https://roserilufelojow.weebly.com/uploads/1/3/1/8/131856860/2207524.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f89c985-0c27-43d8-b777-7e15534139c8/hp_officejet_pro_printhead_error.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/66473911772.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/carbon_fiber_wallpaper_hd_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/3366711096.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_76f9be236c8a4803a8128395d5279b7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8d70eb-b1e2-4afb-9b73-f2b77a1d064a/chrono_trigger_ds_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/bootstrap_4_classes_list.pdfIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_c8f892406963438586765e4991161577.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/anandam_2016_movie_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ed1a11-5ce0-4367-b35e-7bec44b2100e/can_i_share_a_live_video_from_facebook_to_instagram.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_c35ea52fa35442e19181af88bbaf6b2f.pdf?index=trueIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_e4fe5d8925c149aea6b3ef5ae2d9b61e.pdf?index=trueIn PDF document text
    • https://502e425a-54a0-4661-a3e6-c6e116bdb13d.filesusr.com/ugd/10da26_5401fe2110a14004b16bc867a06cfb6a.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_580ad03c16824f05be010743174c4579.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 5284 bytes
SHA-256: 35c28a72b7d62917a06e49aa401294944445ae7e32d16cd55dfc7b884c693a8f
font_01_sfnt_off00011cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBE 2012 bytes
SHA-256: f29791c577fb8efd97a4133c5aa60f7028e8039184fbef8522f7a35ca0b46ea9
font_02_sfnt_off000125f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F4 11096 bytes
SHA-256: aff5ba79230b77e717b0dfc5a691a00b7f5adb4561895c209ade9f99b1b8ee3e

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