Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8b299b04779687…

MALICIOUS

PDF

169.4 KB Created: 2021-05-15 05:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ac3ec8e2a28898a5e4802813069fcb0d SHA-1: 9e3157374cb6613c2f49cb04a7a72330b3f1d6e0 SHA-256: be8b299b0477968792b6b552d1479bb2cc927ab9df2b09a22cd30af79af63e37
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating redirection to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=stopping+by+woods+on+a+snowy+evening+analysis+line+by+line+pdf In PDF document text
    • http://bumasujofoj.getenjoyment.net/belufifam.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/jspdf_autotable_font_style.pdfIn PDF document text
    • http://dakejexisumupok.iblogger.org/juwedarobiludevujexelozus.pdfIn PDF document text
    • http://zakozoxutujo.22web.org/mccartneys_ludlow_market_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5fe3dd01526c5.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/2hdrTgf/roliwabotusizagipen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374373/normal_5fc6933cbfcfe.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/ij5hhEQ/jump_the_broom_meaning_marriage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_601de697bf5c5.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/bfZKKBt/55697855343.pdfIn PDF document text
    • http://wacc-cat.org/8960619315ezm3.pdfIn PDF document text
    • http://maxuruz.22web.org/levijadutefuvobunopif.pdfIn PDF document text
    • http://cabinetshub.xyz/nie_boska_komedia_streszczenie46egp.pdfIn PDF document text
    • http://neo-tp.ru/86390458775qnyp6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5feea2b26b044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_600376301d4b9.pdfIn PDF document text
    • https://cdn.sqhk.co/jebuxanit/d5wxjdk/mobile_patrol_wilmington_north_carolina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mituzoleti.epizy.com/livro_ortopedia_e_traumatologia.pdfIn PDF document text
    • http://jutuvilulador.epizy.com/is_fl_studio_worth_it.pdfIn PDF document text
    • http://tinodaxaxaduj.rf.gd/sajotujiturelifezovivuvuw.pdfIn PDF document text
    • http://xokopaxitake.rf.gd/pezowamisalajapowubo.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/plant_and_animal_cell_worksheets.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
stream_002_off00010c7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C7B 116024 bytes
SHA-256: ca354c386e6d4b6f4a407f14afb9a1bf0ef4545dbb82f470f1e194302e1d7f1d
font_01_sfnt_off00025e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E8A 5608 bytes
SHA-256: a41c81e3edf8e228cee09941719fbf447d8648c90061b6558c3d512f1ef0df3a
font_02_sfnt_off000271d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x271D4 10252 bytes
SHA-256: f6b47a49eba715e737dd5d4a305eb5b5f54590cf6014d27e9cbf6bb866da605e

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