Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e55849567c1c76…

MALICIOUS

PDF

76.3 KB Created: 2021-02-27 23:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 320105b407146324e33881aaed14f7ba SHA-1: 71e29414993197ac7fb23a3581e0f2d271de7344 SHA-256: 62e55849567c1c76d55ee9ca1c04630ac2a1c6d3c91369d8c608facd4c511e8a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of numerous external URLs, many hosted on disposable domains and employing UTM parameters, suggests a link farm designed to distribute malware. The document body, though heavily obfuscated, contains references to printer models, likely a lure to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=mfc+7860dw+printer PDF link annotation
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/nutev.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/jajajix/ww2_polygon_download.pdfIn PDF document text
    • http://fionainthefield.org/6036113077wvryw.pdfIn PDF document text
    • https://redodire.weebly.com/uploads/1/3/1/4/131408340/gamobew_tupiwuke.pdfIn PDF document text
    • http://qiwi-wallet.online/10517732325y0oyx.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/sikoragusamulu.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/gitgjhb/nimimesedidubazozokakolod.pdfIn PDF document text
    • http://idealicaitalia-official.site/briggs_and_stratton_pressure_washer_3000_psi_parts3xiyn.pdfIn PDF document text
    • http://twobigs.space/738265285918dfxa.pdfIn PDF document text
    • http://vostokzapad.su/ethiopian_driving_license_examdbrbg.pdfIn PDF document text
    • http://afracheat5.xyz/purble_place_download_macabbqa.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/jdjfFij/netunudizu.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/hQPpvjj/45550309187.pdfIn PDF document text
    • https://xinemituvirow.weebly.com/uploads/1/3/4/1/134108685/a70ff95a2089e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fesenobonirizu.epizy.com/82585429799.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/xirejewujunuruxelijeso.pdfIn PDF document text
    • http://zuronixo.rf.gd/baazigar_song_status.pdfIn PDF document text
    • http://fugubujilaxi.epizy.com/mojojawakajivukof.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_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 5396 bytes
SHA-256: 8ee355e3bdea3560479e9247bc00cc6032372e26f5700b906fb4ffcf160736c9
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 10804 bytes
SHA-256: 413bf634b321c37eb9184bfa7efa7a6bf524f1bd435d3939438a4148348981d5

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