Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b80db60a266883f…

MALICIOUS

PDF

83.2 KB Created: 2021-03-21 21:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd06e27344dd0e2c3a9c32c35bb5c7b5 SHA-1: 101951c0d54c30094ff7aece2082597f00dd0096 SHA-256: 9b80db60a266883f910f1e042a4187d59e143700afbec7a195831a576ce1e2fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to search terms and PDF generation tools, suggesting a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/award?keyword=bathilda+bagshot+a+history+of+magic+pdf
    • http://zokazurimila.mygamesonline.org/61858856758.pdf
    • http://feremujidonigu.getenjoyment.net/32092923572.pdf
    • http://megantv.site/51827906950tewsa.pdf
    • https://cdn.sqhk.co/vafodagusun/iegcMjh/smart_balance_oil_ingredients.pdf
    • http://eurostore.info/1503802048w3j8c.pdf
    • http://tlgfree.xyz/azimuthal_quantum_numberopoc1.pdf
    • http://favodokoleti.mypressonline.com/zigaxibexavulolovaxegaxu.pdf
    • http://qwonder.space/75083086162j7yf3.pdf
    • https://cdn.sqhk.co/sezunofubuzi/ggfhfhd/81303567988.pdf
    • http://tebapewulodafe.getenjoyment.net/what_did_the_third_estate_include.pdf
    • http://vulufinagi.mypressonline.com/xukisavigoveriferosoluw.pdf
    • https://cdn.sqhk.co/vazedibimi/ijdid3A/pabawotopaxasudurumititi.pdf
    • http://mpvideo.org/informal_methods_used_to_amend_the_constitutionhi653.pdf
    • http://zatoxuvisovapuf.sportsontheweb.net/63483657168.pdf
    • http://xepidenad.scienceontheweb.net/fallout_shelter_mysterious_stranger_no_sound.pdf
    • http://xilatotes.sportsontheweb.net/pafeboresunetalokojox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tumuzu/4x-5y160_and_2xy-60_in_hindi.pdf
    • http://rakixufemagotut.atwebpages.com/dupajixesefelo.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/chrome_bn_mi_nht.pdf
    • http://pilejifizodan.onlinewebshop.net/cheats_for_the_sims_3_ps3_infinite_money.pdf
    • http://gavawekib.myartsonline.com/27907881911.pdf
    • http://nukivamo.myartsonline.com/lomatisigatajafigup.pdf
    • https://s3.amazonaws.com/nopomewegobij/oakley_sunglass_size_guide.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_off000100ee.bin
b580385f646796e3d1242390a4eb988433c0fea8cea48a11067f325843cfab39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 5860 bytes
font_01_sfnt_off000114c1.bin
883931bec979e8a5059dbce754157ac9d9ccc96a65fab67fc09b8fbb86864bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 13208 bytes

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