Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc0b47da4a4e482…

MALICIOUS

PDF

72.0 KB Created: 2021-03-21 23:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b0a9d2bd2880ae1f1cca17136d04e66f SHA-1: e7bd68a5d7e3bc83a6bd485536184b4aea5e42cc SHA-256: dcc0b47da4a4e48279c565e31c5864e2d5f453387f72b0cb9db26d3ccad0e235
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://leonvi.ru/wix?keyword=msp+hacks+for+star+coins PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451375/normal_603813812c3f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380540/normal_60097f6de7f05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_603438b0783de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5ff813c657fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5fd2438763a33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5fdf3381778f3.pdfIn PDF document text
    • http://nakaxovatixokew.22web.org/psychology_meaning_and_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388611/normal_6053c479107e3.pdfIn PDF document text
    • http://neditaxuvim.getenjoyment.net/membrane_bioreactor_seminar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_6022617b92ad9.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/cbse_admit_card_2020_class_10_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467027/normal_603716c435a19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449177/normal_5ffb448abd913.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovabaz.epizy.com/lajivinafugokeb.pdfIn PDF document text
    • http://towupew.epizy.com/bachon_ki_kahaniyan_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/vadirikovufawaxebiwonek.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/horowitz_report_doj.pdfIn PDF document text
    • http://zaxodeziwepaf.epizy.com/the_foundation_trilogy_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/20887486123.pdfIn PDF document text
    • http://nanoxamovafosox.epizy.com/14445231608.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/wrt1900ac_dd_wrt_or_openwrt.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_off0000d216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD216 3136 bytes
SHA-256: d178bc7365be781b9374ab51aafe4061f53e18b75aefca28d56a17cb9b8bc056
font_01_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 5140 bytes
SHA-256: 3783bc52fc81f6ac6f61683d5c8fb09fe80bae5c8c77cb1b753f11e9c84f568d
font_02_sfnt_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 9972 bytes
SHA-256: aa7b948d63ac1c04891be14b1976196acbaf0c4c6f7a38465b44e94270a578db

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