Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea02c183ef38327…

MALICIOUS

PDF

78.2 KB Created: 2021-03-29 23:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6baff335fb2a77d6170b527e7c344631 SHA-1: cd163e1a6a98b39cc671e61c80dd6442cdf6e15c SHA-256: dea02c183ef38327b0638cf7101f9d267bd6a90671832bac9ad66fc632582645
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are used to redirect users to potentially malicious content.

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
  • 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://lozipotod.ru/strik?utm_term=best+portable+ac+unit+with+dual+hose PDF link annotation
    • https://karesaxu.weebly.com/uploads/1/3/5/3/135392924/pifuboxudifatezovi.pdfIn PDF document text
    • http://sevazumemozoli.22web.org/winter_fishing_guide_stardew_valley.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/o4idNWU/modern_warpath_hero_survivors_vs_walking_dead.pdfIn PDF document text
    • http://xepuvibigin.22web.org/pewavara.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/2c98a.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/2fee4ca.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/jiahfdL/battery_charger_schumacher_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/vexelomuveg/gRzhajb/71225999859.pdfIn PDF document text
    • https://vezerovir.weebly.com/uploads/1/3/4/5/134580053/badoso.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/davulawokufu.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/bogorigesusanoji.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/hcbEtBS/apps_like_layout_for_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/auXkibD/xizudomezegejamuba.pdfIn PDF document text
    • https://butadagawonor.weebly.com/uploads/1/3/1/0/131070306/liwuvetol-wotagurozugi-pezofi-doxof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jawamamabob.rf.gd/wofew.pdfIn PDF document text
    • http://zivikabazixo.epizy.com/castration_procedure_in_dogs.pdfIn PDF document text
    • http://welojorolepone.rf.gd/kemopivewizikavo.pdfIn PDF document text
    • http://tinulelor.rf.gd/boss_bv9386nv_steering_wheel_control.pdfIn PDF document text
    • http://widafasamuj.epizy.com/camera_xiaomi_redmi_note_7_apk.pdfIn PDF document text
    • http://ruboratanon.rf.gd/the_end_is_nigh_gamekult.pdfIn PDF document text
    • http://limonoj.epizy.com/71255622601.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/datsip_annual_report.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_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 5444 bytes
SHA-256: a02c7f43bd0d26225eb2d190050d1f669b786284803c32dd7aaebfdf44053f5a
font_01_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 10928 bytes
SHA-256: 021a1b40972829962cb628732e4cd0761e4b47b58a850d8c99e20cbfcd250ace

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