Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bea482e3a0a6061…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 07:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a421b13d62a6a7e2917bb3fa1d32f38f SHA-1: d12dee87c8dc0c07a67d16e96edde344b09bf870 SHA-256: 2bea482e3a0a60614968d1766e6c402778c5fc02e447615c79e4961e28468c6a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme. The primary malicious URL identified is https://pelibifir.ru/wix?keyword=por+y+para, which likely serves as a redirector to other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=por+y+para
    • https://cdn.sqhk.co/gavezexu/ZheR1ib/41422454864.pdf
    • https://panofokolonap.weebly.com/uploads/1/3/4/4/134483377/xopodo_jelazanir_totemuroz_sibobu.pdf
    • https://cdn.sqhk.co/vipikunowi/Agehezb/15678775348.pdf
    • http://pagebake.com/characters_in_troilus_and_cressidanucan.pdf
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/tebegom.pdf
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/b0b0a16dbdbcc29.pdf
    • https://vobudogekatobef.weebly.com/uploads/1/3/0/8/130874620/bekufufatinoleduf.pdf
    • http://erogancolumbia.site/nikka_zaildar_2_full_moviemqvjc.pdf
    • https://nilemesobipefuj.weebly.com/uploads/1/3/2/3/132303022/3916231.pdf
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/mebaman_fizijozare.pdf
    • http://amst-watch-v2.club/ramopashlil.pdf
    • http://premium-cinema.com/apc_back-ups_es_550_mac_software03zfl.pdf
    • https://cdn.sqhk.co/samofetob/flNSzia/last_shelter_survival_toolkit.pdf
    • https://radoxawema.weebly.com/uploads/1/3/0/7/130738714/1433967.pdf
    • http://cheapestshop.xyz/pigonafawowehvw50.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xijaxatob.epizy.com/is_white_fang_a_true_story.pdf
    • https://uploads.strikinglycdn.com/files/e986f79a-e4f6-48f4-aba4-817b0cb39278/what_kind_of_intermolecular_forces_are_present_in_ch2o.pdf
    • https://uploads.strikinglycdn.com/files/2047e258-4201-443f-a087-889c8f0ab405/what_is_the_best_0_turn_mower.pdf
    • http://kanuximus.rf.gd/barbie_girl_dance_song.pdf
    • http://kunerev.epizy.com/775933827.pdf
    • https://uploads.strikinglycdn.com/files/c8de4892-e90e-421c-a294-3e810c7bb50c/xugivivamezilamabazori.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_off0000f914.bin
00d2c3562d44d0b9f388bae1420149af3671cce2bd223f2e85982bb635247d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 4144 bytes
font_01_sfnt_off00010715.bin
f1fa05ddc79a5f2cdf003b93dfb4cabd5274942ee42337d12765137f4e04ec1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10715 12216 bytes
font_02_sfnt_off00012eea.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEA 4324 bytes

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