Malicious PDF — malware analysis report

Static analysis result for SHA-256 00da72b0101490fc…

MALICIOUS

PDF

75.5 KB Created: 2021-05-05 14:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1cb2a265e2521046bc718cc392b11713 SHA-1: 22773aec7d2aca41c2f43eaa79e723ae26cc1f76 SHA-256: 00da72b0101490fc64696af9ba6a3120e841155e677f12f349497f075ee8986d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF document contains heuristics indicating it is a link farm and a lure for remote support tools, suggesting a phishing or social engineering attack. The embedded URLs, particularly `https://lozipotod.ru/strik?utm_term=how+to+clean+a+cuisinart+coffee+maker+with+keurig` and `http://eliyalte.com/livusurajutezipo7df.pdf`, are suspicious and likely lead to malicious content. The document body, though heavily obfuscated, contains text related to cleaning a coffee maker, which serves as a pretext for the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://lozipotod.ru/strik?utm_term=how+to+clean+a+cuisinart+coffee+maker+with+keurig PDF link annotation
    • http://eliyalte.com/livusurajutezipo7df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447265/normal_6006b2a94192c.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/ifjdJXM/splashtop_wired_xdisplay_agent.pdfIn PDF document text
    • http://semengergel.ru/bang_bang_full_movie_free_mkv0adyq.pdfIn PDF document text
    • https://cdn.sqhk.co/fagojefavap/ev27i8u/mujunuzog.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/ehhgepV/chance_the_rapper_lil_yachty_freestyle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_6009a5362e893.pdfIn PDF document text
    • https://jiludagurifo.weebly.com/uploads/1/3/4/3/134349737/c9407da1f97.pdfIn PDF document text
    • http://huaweistoreukr.xyz/if_two_players_have_full_house_who_winsax5ei.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_6052bb07893e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_6011522147c4a.pdfIn PDF document text
    • https://letosuve.weebly.com/uploads/1/3/0/7/130739520/09c683fb97232dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dojonuta/caging_skies_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32fdf759-48f3-4762-81a4-259f354e837e/afterglow_headset_xbox_360_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbfca69-f818-4a82-ae1b-709d651b125f/what_einstein_told_his_cook.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/preposition_practice_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58f674e-2d20-4204-ab22-70e0f64baa47/delta_baby_bassinet_mattress.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/income_tax_calculator_spreadsheet_india.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/famous_quotes_from_george_washington_carver.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 5412 bytes
SHA-256: f6f1a0dc6ee1518ebd450f8c08e96f2ea2c2461abe3395d36265d37b4d47cffc
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 10964 bytes
SHA-256: 6af68c54a399c4895ab2cb6fac39ea0e764d565b5f48689bc0481486aad770ca