Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc40347de6443c7…

MALICIOUS

PDF

83.3 KB Created: 2021-04-22 14:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7449cdd0f96f732716b20069a10ab0cd SHA-1: 5964187fcf2fb31f4da9147bd9927e1528f45db3 SHA-256: 7bc40347de6443c75ef31762e3f95c75b165ba5d8e68f8cab00d5091eccc2bf5
126 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The PDF's structure and the presence of numerous external links suggest it is designed to redirect users to malicious content, likely for phishing or to download further malware. No scripts were extracted, but the PDF's nature and the detected malicious URL are strong indicators of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=how+to+adjust+draw+weight+on+bear+brave PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458839/normal_603ffad5baee1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5fe49f2d6a34c.pdfIn PDF document text
    • http://dokisiz.iblogger.org/87354733676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5fe6ccab8f01b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_605ef2bf1208b.pdfIn PDF document text
    • http://wusapibixabupak.iblogger.org/13957154393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5feff8dc4f35d.pdfIn PDF document text
    • http://kisikevofe.iblogger.org/ratosifidipegelo.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/safago/is_planet_fitness_really_open_24_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d8927a-ac96-4b9d-b1ee-21c056e764f6/how_many_big_little_lies_books_are_there.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39590b34-cb2f-4859-be9e-feed633f28c5/how_to_write_thousands_in_ap_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab62345-e0d5-494f-8539-ac63ceadfa5d/pokemon_ultra_moon_ultra_wormhole_legendary_guide.pdfIn PDF document text
    • http://jawevobafepen.epizy.com/where_is_a_temperate_forest.pdfIn PDF document text
    • http://makugisag.rf.gd/45092597274.pdfIn PDF document text
    • http://xodijofo.epizy.com/what_words_begin_with_em.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/smadav_antivirus_free_latest_version_2019.pdfIn PDF document text
    • http://duxuramubot.epizy.com/32965852623.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/80015919678.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/sagiwupafonikaxarukaxut.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/bedobaxolezuzipaxudabu.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/12950539010.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4B 5384 bytes
SHA-256: 79e22461a638e556c9660a9816957d2598e8af1b3dc10f1daf05b7db7b09861d
font_01_sfnt_off00010eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAE 19420 bytes
SHA-256: 34990cc7dca7e4b316d0ef03e9190b7bac30a4f00047454470d58ba20c30a1f0

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