Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c3c81dadd26a66…

MALICIOUS

PDF

78.5 KB Created: 2021-04-06 22:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c7c2400a3e508c9e068a52aafeff41c6 SHA-1: 2d3df60bc5f695abbdb5188be1341e67ca031043 SHA-256: f2c3c81dadd26a66087289c8e31eca017ada75f60a2e32bd9f439539016cad7d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('nipisod.ru' and 'iglivesupportteam.com') that are likely used for phishing or to serve further malicious content. The document body, though heavily obfuscated, suggests a lure related to common household issues, a typical tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=how+to+get+your+fire+detector+to+stop+beeping PDF link annotation
    • http://iglivesupportteam.com/6950061926909whp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484609/normal_5ff6075d26a67.pdfIn PDF document text
    • http://tumbochka.space/java_interview_preparation_guidecug83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5fd397db643ec.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/which_harry_potter_book_took_the_longest_to_writet8ule.pdfIn PDF document text
    • http://bloodcraft.online/ohio_state_football_schedule_20202yqos.pdfIn PDF document text
    • http://busibear.com/how_to_update_q_tv_boxx8xl0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410443/normal_5fc642ea5a2e3.pdfIn PDF document text
    • http://com-connexion.xyz/android_secret_codes_20198a8co.pdfIn PDF document text
    • http://gatorama.fun/27433889758dfd56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_5fd61255b5a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5fd76f9ab534e.pdfIn PDF document text
    • http://islta.fun/vebefetoxunabazoxuges2adkx.pdfIn PDF document text
    • https://cdn.sqhk.co/nosasawup/fjfJ5yW/ironman_chattanooga_2019_athlete_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/modesarox/3jipSCZ/like_a_boss_songs_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d639f96d-2cd7-4eec-8190-c8ec4d059712/netgear_powerline_1200_ethernet_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ffec9b-f702-4164-8b3d-39600558262a/why_is_growth_and_development_important.pdfIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_026c24402dd04ac4aa1bc757adf9750e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb0f482-cec0-4b13-981b-d32173221b59/what_kills_spotted_lanternfly.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_ab83854272164c7a8d6a011dae840cfe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c887da-a70c-4574-90fe-2ef1efc69f96/tv_lcd_toshiba_regza_mati_standby.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_9aa61f1204314414bb1c89148be1a88b.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_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 5376 bytes
SHA-256: 0b6e178211b0c89d905c6c5975f8121c5c8349885a04f1d3fef1b443cdec2ace
font_01_sfnt_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 10608 bytes
SHA-256: ba365fd8d8c6e0994b23ca380455786a9dfe7ebf9c2e40f1dcaf7c4248d67843

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