Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb79d281f40470f…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 05:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b764b8b2c150914a408d07979657eb1 SHA-1: d59ddb9d7ce71985f9829c47236bf114f2eb3806 SHA-256: 5eb79d281f40470f686eab3068e138461766cd4675e3ca0aa4d08e6423f9ddb2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, which are indicative of a link farm used to distribute malicious content or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to a "Warrior mindset pdf".

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/wix?keyword=warrior+mindset+pdf
    • http://kefoweloruzopos.22web.org/kufopowivibojubejoku.pdf
    • https://static.s123-cdn-static.com/uploads/4417834/normal_5fcd3cc3c5f9b.pdf
    • http://opit.space/candy_crush_friends_saga_apk_android_1woyow.pdf
    • https://cdn.sqhk.co/noneniwetav/Eid7icc/this_is_home_switchfoot_lyrics_meaning.pdf
    • https://cdn.sqhk.co/fojupigek/ghcnEIg/voltage_drop_testing_fuses.pdf
    • http://metalllift.ru/72731623074yrbqr.pdf
    • http://gnatural.space/pexubaguj9ohj.pdf
    • http://kugewezebuvigiw.mygamesonline.org/situacion_politica_espaa_siglo_xix.pdf
    • https://cdn-cms.f-static.net/uploads/4465694/normal_60301f9420f79.pdf
    • http://mebel-albero.ru/is_tokyo_ghoul_season_4_the_last_season59c17.pdf
    • http://womans30planet.com/jovixoxugayd8lc.pdf
    • http://topukovatawosu.sportsontheweb.net/niv_application_commentary_romans.pdf
    • http://tilosag.mypressonline.com/61246718262.pdf
    • https://cdn.sqhk.co/leruwexikud/idcgemu/the_crossing_apartments_anaheim_reviews.pdf
    • https://cdn.sqhk.co/nakotuba/cgiKhhi/40934552729.pdf
    • https://static.s123-cdn-static.com/uploads/4480588/normal_5fdfb22861923.pdf
    • http://opencabinets.xyz/what_is_elective_cesarean_sectionmgcvq.pdf
    • http://yesnutural.space/77109220856lqtho.pdf
    • http://energierecrute-emplois.com/lisuzegegopefiviwelewfp4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nosudalivuza.epizy.com/32923669471.pdf
    • http://zinamasab.epizy.com/31696833996.pdf
    • http://natizuf.onlinewebshop.net/dituwawitexegemetutuxa.pdf
    • http://supuwevul.atwebpages.com/volume_of_prisms_and_pyramids.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50c.bin
8789df830ea098331b0b4d504b21c671688e61adb87f4a90fe75612dab82a580		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 5168 bytes
font_01_sfnt_off00010697.bin
ff5f30f246a656ccebcbb29b0d1a32205abec4f73b3dddc48d027fb960037e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 11136 bytes

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