Malicious PDF — malware analysis report

Static analysis result for SHA-256 01eac9924b993a33…

MALICIOUS

PDF

76.9 KB Created: 2021-03-29 10:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8960cea7ce7a8b1f75e04e8a3eb7744c SHA-1: 7ecb62dde98e2bee55720aaaaa35716c29aa51bb SHA-256: 01eac9924b993a336694fa2cb910f6bb581ab1934e1c802a1b1cb7b34da7b65e
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many pointing to Weebly and sqhk.co domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=mathematical+physics+pdf+for+bsc+1st+year
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/3264285.pdf
    • https://fifofisepag.weebly.com/uploads/1/3/5/9/135985139/832fda22ad.pdf
    • https://cdn.sqhk.co/penavagalo/oSUvBfR/fabomedojutazewavoxozevu.pdf
    • https://nadepopuzoli.weebly.com/uploads/1/3/4/6/134611029/56ae5d169d8.pdf
    • https://cdn.sqhk.co/wigalefu/jagjyJL/cara_bermain_multiplayer_di_city_racing_3d.pdf
    • https://cdn.sqhk.co/takivelalam/jiihWSt/o_que__retilneo_e_uniforme.pdf
    • https://pugulewex.weebly.com/uploads/1/3/1/4/131406013/5879549.pdf
    • http://helplnstagramoffice.com/jazz_2nd_edition_scott_deveaux37lpe.pdf
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/mimowoxu.pdf
    • https://cdn.sqhk.co/kawurefeki/O7EfJjf/ninja_smoothie_blender_amazon.pdf
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/seloki-surovovarapek-tufasaxufizomel-jesokiroliso.pdf
    • https://cdn.sqhk.co/biziduwime/B8Cifjg/pool_billiards_game_for_android.pdf
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdf
    • http://exampl1214.com/jisowerufulilubloaic.pdf
    • https://zuvofuguwapu.weebly.com/uploads/1/3/4/0/134042474/fixebidotute.pdf
    • https://cdn.sqhk.co/lizoxazafofe/MloCSia/59541531792.pdf
    • https://cdn.sqhk.co/ramawuvade/jhjn1gi/xexikanitisokuma.pdf
    • https://cdn.sqhk.co/tirabipati/aidjbje/diy_mask_holder_chains.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000ee1e.bin
ffc0d86bd58d11ed9dd3c14b5dbc7be801a7db62eb8f6064bc27eb96b48a65e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 5692 bytes
font_01_sfnt_off00010163.bin
fc3b813b3af33318e4ccd9c5971f637595936c322f5f282a0dd6836b787df981
pdf-font-stream PDF embedded font (sfnt) at offset 0x10163 10988 bytes