Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d414018f89fcd3…

MALICIOUS

PDF

87.8 KB Created: 2021-02-28 15:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 224edd12a0300f332d568f0caac89750 SHA-1: 9bec87147621b63643c6d3c472f4c2a7dd880769 SHA-256: e5d414018f89fcd3e26aa93c8f9f55cc081048a7e3efce40cb69490605989620
186 Risk Score

Malware Insights

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

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 0.9994

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=what+causes+a+washing+machine+to+not+spin+all+the+water+out PDF link annotation
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/4a550747c642.pdfIn PDF document text
    • http://gulexamotapa.iblogger.org/kijokeluginisuzuliwox.pdfIn PDF document text
    • https://taxesewisozigif.weebly.com/uploads/1/3/5/3/135394589/7304976.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/holt_mcdougal_algebra_1_common_core_teachers_edition.pdfIn PDF document text
    • http://limevekobo.iblogger.org/vubozunosetenad.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/praise_and_worship_songs_2018.pdfIn PDF document text
    • https://fobabunopana.weebly.com/uploads/1/3/0/9/130969757/bozirakip.pdfIn PDF document text
    • https://pemogele.weebly.com/uploads/1/3/5/3/135324676/4753966.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/magic_water_drawing_book_amazon.pdfIn PDF document text
    • https://rapodiduwegez.weebly.com/uploads/1/3/5/3/135311990/5107036.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/zosufelo-rizagovekuw-bekofimera-bigulam.pdfIn PDF document text
    • https://xobawaxotax.weebly.com/uploads/1/3/1/4/131453143/4d2db64.pdfIn PDF document text
    • https://fekipasipoxow.weebly.com/uploads/1/3/1/6/131637207/mesotafugofi.pdfIn PDF document text
    • https://likufuzojelawaf.weebly.com/uploads/1/3/5/2/135298946/ropinaxiduji.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/tutuxitodutab.pdfIn PDF document text
    • https://pogudemuzam.weebly.com/uploads/1/3/4/0/134018755/629331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujikiwereka.epizy.com/wofufokufa.pdfIn PDF document text
    • http://firixafuzive.rf.gd/how_to_pick_sentry_safe_lock_box.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/dragon_ball_z_3_android_game.pdfIn PDF document text
    • http://tolimimagag.epizy.com/corresponding_alternate_interior_angles_worksheet.pdfIn PDF document text
    • http://dopafedoxafedar.rf.gd/bahubali_movie_video_song_full_hd.pdfIn PDF document text
    • http://tenowuwewid.epizy.com/jawbone_jambox_app.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 5452 bytes
SHA-256: 3a4f8efb7840a504de92148a12c3b21a6694a568b72f8e367f80520720791bc5
font_01_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 11248 bytes
SHA-256: 216e352595b5c6f25c37dffb5ef465e92581f46db634026e335c70a7e378c458
font_02_sfnt_off00013bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFC 16148 bytes
SHA-256: 333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd