Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87f0369e247fffe…

MALICIOUS

PDF

84.0 KB Created: 2021-03-20 05:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7852a38065dc4d99612b0669dc4763d6 SHA-1: 257e8b6f09f4bf47b0b75974c25c94831edf12bb SHA-256: d87f0369e247fffefd7b8ea1482ada5f897b6b22f1e8dbee338f59f31432632f
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing lure. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/123?utm_term=cute+kerala+babies+images+free
    • http://wirajamosilun.22web.org/97079971980.pdf
    • http://pihodze.com/kinesiologia_uba4oedi.pdf
    • https://sutiwipuxepol.weebly.com/uploads/1/3/4/5/134517417/malikosas_kolenid_dixusuzamo.pdf
    • https://sojenakituvewo.weebly.com/uploads/1/3/3/9/133986345/laximef_zizibulafik_mutimutasufilom_ponef.pdf
    • http://fexevewuli.mypressonline.com/is_there_a_ghost_in_power_book_2.pdf
    • http://snatural.space/banuzoxevekuwikomonifopa9xvkp.pdf
    • http://pokafusolitix.iblogger.org/ct_file_online.pdf
    • https://sexojeno.weebly.com/uploads/1/3/3/9/133997780/ganuzuwevosidesoga.pdf
    • http://mokuduvejevuz.scienceontheweb.net/online_converter_to_mobi.pdf
    • http://vinnipoh.space/rccg_sunday_school_manual_3rd_january_2021572xq.pdf
    • https://bebiluredop.weebly.com/uploads/1/3/3/9/133987060/3597298.pdf
    • http://koteyarn.moscow/sears_modern_homes_floor_planszlwav.pdf
    • http://pigigozoruda.mypressonline.com/whirlpool_duet_sport_ht_capacity.pdf
    • https://kadekorik.weebly.com/uploads/1/3/1/4/131453454/fojar_vafapuxig.pdf
    • http://nujokopinud.iblogger.org/tp-link_wpa4220_wifi_powerline_adapter_kit.pdf
    • https://bopojebokup.weebly.com/uploads/1/3/1/4/131408204/robudusa.pdf
    • http://predouche.xyz/widakanezofogokarnxjv.pdf
    • https://wiriresakuboso.weebly.com/uploads/1/3/4/2/134236055/4dfb25.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6f78c6f4-ccd7-415c-a04c-2a238018fa0d/rubugabuserapepuki.pdf
    • https://uploads.strikinglycdn.com/files/1c57b411-553d-44ec-82c1-dc72f77908ac/how_long_to_cook_turkey_chili_in_crockpot_on_low.pdf
    • http://tebuwawezizafes.onlinewebshop.net/stihl_blower_vacuum_bag.pdf
    • http://juwukopegonamu.onlinewebshop.net/nakub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcbf.bin
4332b6deb7b72adf7aa519cbcab79013b32abe6e3e7eba00db411162480a6f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 4980 bytes
font_01_sfnt_off00010dba.bin
1f961e3c7ec5b8ed2e39367094c3d600650238632543d2ddd2b50ac86ab9a7e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBA 11408 bytes
font_02_sfnt_off0001340e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1340E 4324 bytes

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