Malicious PDF — malware analysis report

Static analysis result for SHA-256 5251d290e0afc95d…

MALICIOUS

PDF

81.3 KB Created: 2021-04-06 04:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 86211600185a3c681cfe1310c4904552 SHA-1: 5cd709fafabb7aa3fb8409a56b1fa485fb990fdf SHA-256: 5251d290e0afc95da091d72bd85e9ee2bf5ef97570f68b1e5e2d78151094964a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a malicious document, including a large number of embedded external links, many of which point to potentially malicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or distribute content from various sources. The primary malicious URL identified is 'https://xezojetit.ru/wix?keyword=my+not+so+perfect+life+pdf', which is likely used to serve further malicious content or phishing pages. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://xezojetit.ru/wix?keyword=my+not+so+perfect+life+pdf PDF link annotation
    • http://bosuxezaxad.mypressonline.com/xalebagavarexelobovofo.pdfIn PDF document text
    • http://persequenteamsohbet.com/84273420260r313k.pdfIn PDF document text
    • https://bidiruvinevuf.weebly.com/uploads/1/3/1/3/131379477/lamipuwuxu_dibopufarebegu_wafavapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6063f3d7ea308.pdfIn PDF document text
    • http://fastdonwload.space/kapawumatitonexeja60vwv.pdfIn PDF document text
    • https://banodita.weebly.com/uploads/1/3/4/3/134311275/660522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_600d24e3cbc26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5fedd3efe1456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_600eda3e9c88f.pdfIn PDF document text
    • http://newberginvestmentproperty.com/how_to_heal_chigger_bitesqkifr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fd68a6a7a87e.pdfIn PDF document text
    • http://floradoma.net/optiplex_780_memory_capacitynj4ug.pdfIn PDF document text
    • https://tixusevonatafix.weebly.com/uploads/1/3/4/6/134611731/cf6a9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/miyagi_buster_keaton.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/72957576117.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/nikon_coolpix_l22_manuale_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/apple_ipod_nano_7th_generation_buy_online_india.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/jdsu_hst-_3000_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/is_jump_rope_good_for_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/artemisia_herba_alba.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/happy_wheels_full_version_apk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAE 5752 bytes
SHA-256: 0684dc89c2ed51085ae7d23dc620ece6b5f0eb42807aca13e8ee011d647738f3
font_01_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 5048 bytes
SHA-256: 025423124108685b490d73e807e8bc68031546c76c872b5bcc5a3bc6aed4770b
font_02_sfnt_off000111d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D1 11044 bytes
SHA-256: d44ad3f199800a75506c677e186b5f3732e067236c3f06b8f030f1f8038acbea

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