Malicious PDF — malware analysis report

Static analysis result for SHA-256 9812045866dcb1b7…

MALICIOUS

PDF

80.9 KB Created: 2021-04-09 05:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 36b66b026036e89e65cb93d49d128d0c SHA-1: 7a9e17ac83b2c9c5a9b78aa0ce85cec6b8733846 SHA-256: 9812045866dcb1b782e908ea3db4de46ae615db0be5e3efb03a030781004b7e9
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to vehicle verification, suggesting a lure for phishing or malware distribution. No scripts were extracted, but the presence of malicious links and the link farm structure strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+verify+registered+vehicle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470985/normal_6069739f264b0.pdfIn PDF document text
    • https://novomuzedideb.weebly.com/uploads/1/3/1/4/131406537/9251995.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/wivam.pdfIn PDF document text
    • https://rinugofanux.weebly.com/uploads/1/3/1/4/131437530/mupojavasi.pdfIn PDF document text
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/7dd820d2e0d.pdfIn PDF document text
    • http://xogavuw.medianewsonline.com/jadeb.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/hippolytus_of_rome_apostolic_tradition.pdfIn PDF document text
    • https://beponelife.weebly.com/uploads/1/3/1/1/131164358/dea493e4d3cd.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/hidw8c5/6297458696.pdfIn PDF document text
    • https://cdn.sqhk.co/xarupozikala/sihxjhA/upgrade_sqlite_database_android.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/46464564997.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/mekidexudetoro_josewupanadi.pdfIn PDF document text
    • http://vinuwosozo.iblogger.org/90629859180.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/c69887d7feeb75.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/gta_vice_city_san_andreas_cheat_codes_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_6018315f27b1d.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/cejjxPy/fanatical_basketball_mod_apk_latest_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wesokojoposad.epizy.com/android_notification_not_visible.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/bimukediwid.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/russian_volume_lashes_how_long_do_they_last.pdfIn PDF document text
    • http://navepufukoxo.rf.gd/very_mom_seed_ceramide_mask_sheet.pdfIn PDF document text
    • http://zisekajoreva.epizy.com/xoromowupikuv.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_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 5288 bytes
SHA-256: 6bdf430286e338dcc458aff83ac0a562da33914efde49e4ccfb84d1fc9749764
font_01_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 11580 bytes
SHA-256: 166c38b2e5039df32e8659694443be72479bf91ae0c6f9950204b66065823aab