Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bda7dd6e9543451…

MALICIOUS

PDF

83.3 KB Created: 2021-04-17 05:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 89b3810b817f6137d10e874a5e3b9c28 SHA-1: 515a860333976e203b95db5cd67dee358db79c9c SHA-256: 0bda7dd6e954345104c66229c94bdb6f6511425a47961d82a0ce1c8139e3ad40
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.
  • 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://jacksth.ru/strik?utm_term=umrah+guide+book+in+kannada PDF link annotation
    • https://cdn.sqhk.co/lezebulodiw/fhhKr3y/sasozonoxiwarokiriva.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/funedozutalopoluj.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/bhc4zje/60495192821.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/1b126049e13.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/hd53AuD/uga_football_memes_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/853VgdD/rotowire_nba_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/jQijXjg/chemistry_a_guided_inquiry_7th_edition_solutions.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/sims_3_super_patch_mac.pdfIn PDF document text
    • https://wegeduvoxu.weebly.com/uploads/1/3/4/6/134634177/begek.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/gev9hck/cobb_theatres_tyrone_movie_times.pdfIn PDF document text
    • https://cdn.sqhk.co/jujobomo/Tvwjzhc/cosmic_strike_space_shooter_retro_arcade_2019_download.pdfIn PDF document text
    • http://gotosutafizal.iblogger.org/96660047308.pdfIn PDF document text
    • https://wasatetokis.weebly.com/uploads/1/3/4/5/134513062/18b94017bfe2685.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dasobiviwadodaj.atwebpages.com/ethical_hacking_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd210d53-681d-41b2-b392-e56681d65b97/40498797056.pdfIn PDF document text
    • http://gubezerasowig.rf.gd/78109056212.pdfIn PDF document text
    • http://pawulufotes.epizy.com/14157965145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a1dd8a-23ed-40a7-941c-99a6303e983e/daniel_plant_sente_mortgage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3119b488-c616-4e66-ba03-bd7034cf1ae1/37029870473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ec2c53-5cc4-4892-846f-9ad69fe818df/xedirorujuninesa.pdfIn 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_off0000fb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 5028 bytes
SHA-256: 8f4337bbd9ded7475e0dac5c4e6de0ffa951c70c61cf9194437abd8cc64a455e
font_01_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 11244 bytes
SHA-256: 3fc1828a7619665c53a305491ae100de2781ce7c23e2462999b81e753f4d0a0f
font_02_sfnt_off000131fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71