Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97cce7cf006c6b6…

MALICIOUS

PDF

78.1 KB Created: 2021-04-02 17:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bb4979fa07ab959bd3c7fd1c105a69b SHA-1: d2b8723a79096fbf5e2a57ec6f722608dc061584 SHA-256: f97cce7cf006c6b6e85ffcc67b712ef69f6f61c453c99b8dd175b659460bfadf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly suggest malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs point to various PDF files, suggesting a potential chain of redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/award?keyword=bookkeeping+job+description+pdf
    • https://cdn.sqhk.co/fowifabibu/FjdHmhe/traincontroller_8_gold_crack.pdf
    • https://cdn.sqhk.co/bureruverog/iiBMhDL/super_mario_jump_and_run_full_game_apk.pdf
    • https://cdn.sqhk.co/folikulezig/jbGgfig/nisakupakekomegakuzem.pdf
    • https://cdn.sqhk.co/kepebeso/jgia46I/sowofobi.pdf
    • https://cdn.sqhk.co/kogoruzojif/dGjbHgc/87244484105.pdf
    • https://cdn.sqhk.co/xibetevoxaj/6aKNmjc/7329094562.pdf
    • https://cdn.sqhk.co/kafevinuva/lYuijhe/biases_in_decision_making.pdf
    • https://telapawuwa.weebly.com/uploads/1/3/5/9/135964826/5a0c72d81.pdf
    • http://pugorot.mygamesonline.org/avoir_et_etre_au_present.pdf
    • https://cdn.sqhk.co/dinigivo/cfZ4bXu/94639188271.pdf
    • https://cdn.sqhk.co/benanejufa/heSgjhd/70243848808.pdf
    • https://cdn.sqhk.co/tidilotofuka/gdjgjgc/beholder_bomb_manual.pdf
    • https://xoxopazivufa.weebly.com/uploads/1/3/5/3/135398299/1834040.pdf
    • http://fuxanujibiz.mygamesonline.org/73365393421.pdf
    • https://pajolabu.weebly.com/uploads/1/3/4/4/134482361/fesivutabi_fodefoban_nokezafipu_fojamuxisa.pdf
    • https://cdn.sqhk.co/woteruzid/ihcPpUu/43106793675.pdf
    • https://cdn.sqhk.co/xedufoga/gggebia/87984811767.pdf
    • https://cdn.sqhk.co/wamamuli/Xiigehd/essentials_of_cardiopulmonary_physical_therapy_hillegass.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/befarekogol/37726775091.pdf
    • https://s3.amazonaws.com/fidefofudi/46360796593.pdf
    • http://zuxokoberibaw.atwebpages.com/vitugajani.pdf
    • https://s3.amazonaws.com/sigobija/el_alquimista_audiolibro_completo_en_espaol.pdf
    • https://s3.amazonaws.com/xanunafojuloki/yakuza_0_yuki_special_training_answers.pdf
    • http://wadoromutisagar.myartsonline.com/azitromicina_eurofarma_bula.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_off0000f386.bin
89a757fe5594f696f363d962bfd1b05b9ea2a5ed54c617a644681f0a67a70fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 5412 bytes
font_01_sfnt_off0001060a.bin
7703457aa7d1cbc53da125ebb7405d5280909f8ccaa4cbe99baf16d827a5b1c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 10988 bytes

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