Malicious PDF — malware analysis report

Static analysis result for SHA-256 045955cf6a3111ef…

MALICIOUS

PDF

71.2 KB Created: 2021-03-28 21:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b150cfa47cd48fbaa26ff303082eac54 SHA-1: 1fa5a4dd5318870ea6ae6eb734c88b6742df9212 SHA-256: 045955cf6a3111efdd42eaccc57c6fda5a767ed33fa80e9c5afc0b2112ee6692
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to PDF files hosted on various domains, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://midufefew.ru/wix?keyword=bad+time+simulator+cross+sans+fight
    • https://gexemuxu.weebly.com/uploads/1/3/5/3/135394015/f305a8aaf0631b.pdf
    • http://arfeshome.com/how_to_add_beta_symbol_in_wordgdmyi.pdf
    • http://fb-ig-violation.com/4311027131355cd7.pdf
    • http://fezufizibum.mypressonline.com/basics_of_networking_concepts.pdf
    • http://libralab.digital/that_evening_sun_commonlit_answers0ch07.pdf
    • http://botavubapisod.mywebcommunity.org/dungeons_and_dragons_online_tips_for_beginners.pdf
    • https://sogatawinasefe.weebly.com/uploads/1/3/4/3/134327891/128e276d62.pdf
    • http://nexofozupugasi.mywebcommunity.org/icebreakers_for_kids_online.pdf
    • https://joripipebepif.weebly.com/uploads/1/3/4/1/134131856/8136290.pdf
    • http://usesol.xyz/somivasogegijajinyj.pdf
    • http://lololoj.sportsontheweb.net/hp_photosmart_d110_printer_wont_print.pdf
    • http://fruits-summer.fun/best_friend_funny_status_video_download8u1sx.pdf
    • http://piredvizhnik.com/vomavadibokilojopetvlfz.pdf
    • http://lukisasore.mywebcommunity.org/ejemplos_de_tesis_de_administracion_de_empresas.pdf
    • http://henrysavbr.site/yankee_doodle_boy_sheet_musiceb1dm.pdf
    • http://hustlinmoney.com/safe_agile_certification_sample_questionsdqja3.pdf
    • http://tuvosudokalidu.scienceontheweb.net/bullets_and_numbering_in_ms_word.pdf
    • http://leririv.sportsontheweb.net/jejamonir.pdf
    • http://com-copyrighit.com/fubofifowepelujorajodiwqwe8y.pdf
    • http://hookup671.site/57378790851udqzo.pdf
    • https://rigegafotu.weebly.com/uploads/1/3/0/7/130740045/6353dec8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_999b343d398f4b209aa8af40877292fa.pdf?index=true
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_6e5594d7a98a4ad8aa3f2b02dac8e09c.pdf?index=true
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_c3d3f80280174c8bb6be9c23b97e0f51.pdf?index=true
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_63b9107b29294b09afaf484663b6e6d6.pdf?index=true
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_39f34261ac20415ba2073ae70b192652.pdf?index=true
    • 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_off0000d8eb.bin
2991c3cf1d63b4fa09aee5af312f3ca48688a05233917388a3147fd54c927aaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 5484 bytes
font_01_sfnt_off0000eb67.bin
d1053748fb5e5518867fe76ee56bdf3c3d0f25c7cf67bc3dd8e885684712c105		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 10264 bytes

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