Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb1fcdee3e45fa2…

MALICIOUS

PDF

77.2 KB Created: 2021-04-20 16:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 79d95aa131914c37116c6095c76badd9 SHA-1: 69a479787485eac295a73167b89731f0c4bc1a8d SHA-256: 0fb1fcdee3e45fa2e98304bd5ea6ec8a4b76fe558815f712c43a48a17034d9c1
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM indicate an attempt to redirect users to potentially harmful 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+kitchenaid+stand+mixer PDF link annotation
    • https://cdn.sqhk.co/woberimi/cijigjc/jungle_oz_endless_run_mod_apk.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/wunolupozsh5k.pdfIn PDF document text
    • http://prodive.su/how_to_pair_bluetooth_device_to_samsung_tvt2nmr.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_602a6de7c91a4.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/Mdhdhdk/spelling_games_for_adults_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/kggyjdV/lokodoriv.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/igohfjd/45915708905.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/bjihggj/win_98_simulator_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/whcgggc/sikisaviwekopomazipa.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/ggcjbaV/revolico_santa_clara_bicicletas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_60545fde76991.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/Rjh7sib/mumatijon.pdfIn PDF document text
    • http://kmplitka.shop/29604947607gytnn.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/0ljiVhg/vutikesupuniwoko.pdfIn PDF document text
    • https://cdn.sqhk.co/winexumalov/d5igij0/17253546500.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/3hjjegf/red_ball_3_volume_2_cool_math_games.pdfIn PDF document text
    • http://varnisvakq.ru/happy_new_year_porn_gifxshd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_8108f5a761064e4bb5e03e6b835fc244.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_9a397872d64843c8bcb3315852869e86.pdf?index=trueIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_22243d3d6afb492c97289487dddf9df0.pdf?index=trueIn 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_off0000eecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 5328 bytes
SHA-256: e806391cad6cbd014a34b9e9ebe5d76d1f1cd5760e5632f1175962b0cec82959
font_01_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 11296 bytes
SHA-256: 0c89ac11956e05a51681b83711d90624ab9d9458d1eede6aaeeb174af2832159

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