Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c6f512716d16bb…

MALICIOUS

PDF

84.6 KB Created: 2021-03-05 00:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c9e36f2ebabb0378436fd0011a680a64 SHA-1: fc1f6aa942d54212adaeb157351fedbc634c8d99 SHA-256: d4c6f512716d16bbd5e1caad8678d1417447ff0ea4bab28a24827e175e84f21d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate effort to obscure the true destination through a network of disposable domains and link farms. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=free+washington+purchase+and+sale+agreement PDF link annotation
    • https://cdn.sqhk.co/kepilujofeje/iljgjjM/gagifasetezibigabukete.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/cjaogcf/yandex_browser_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/ueviehj/90913526948.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/gfjjmhc/minigun_simulator_game.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/UJGsifk/jefemuwisazesigewomeg.pdfIn PDF document text
    • http://todomod.22web.org/61321576440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipowiso.epizy.com/android_root_checker_source_code.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_d16faf3a5a754bb0ad3183e648b30125.pdf?index=trueIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_7a6128ca84e24d6c89ed9e6d38a7961c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/470fea1d-1fa6-4011-a221-dbb13e744538/breakfast_at_tiffanys_watch_full_movie.pdfIn PDF document text
    • http://rukukuwozar.epizy.com/rinodiwogoni.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_d557c0bc105646fe9ce9c1b133491047.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56006ec1-1eee-4d29-a288-c4354a2c8fc4/python_basics_for_beginners_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0b9d34-00cc-47ca-bc6c-080025cc45e0/the_living_bible_life_application.pdfIn PDF document text
    • http://popadugabi.rf.gd/69852872693.pdfIn PDF document text
    • http://nafinuxunowu.rf.gd/bts_dionysus_dance_practice_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efb8a72-78a9-4457-80ab-4440f00d026b/wd_my_cloud_mirror_default_admin_password.pdfIn PDF document text
    • http://kivekovojador.epizy.com/what_can_you_do_with_a_degree_in_systems_engineering.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/49565926507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9131d9-c0e7-4e5f-9ca2-0031acc9834c/does_nordictrack_ever_go_on_sale.pdfIn PDF document text
    • http://kituvofaxur.epizy.com/ecommerce_template_html_bootstrap_free.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_off00010f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F08 5532 bytes
SHA-256: da6d58600d98ecc6ed1d9ef58dd5d1c712242dc07987044c6b2c2821d4b472da
font_01_sfnt_off000121c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C6 10240 bytes
SHA-256: 3f07b0d47f65d2739bc7cbe3b4e65dde49e74c7d941e4cb755cef753fddbbe14

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