Malicious PDF — malware analysis report

Static analysis result for SHA-256 5898dc874c7790db…

MALICIOUS

PDF

87.1 KB Created: 2021-03-19 05:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 016b24c5e1eaa6e4650af4e311ea79c5 SHA-1: 2d32bfd1c0581310cf282b9b0b69d38dbee24de0 SHA-256: 5898dc874c7790db504a8c666279754117716c0ba76b258c7cf3b28ed4f5e7ed
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or hosting malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/123?utm_term=bring+it+on+ghost+korean+drama PDF link annotation
    • https://cdn.sqhk.co/pajokiman/cggQ6hb/zaminuzizimexunibidumefe.pdfIn PDF document text
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/kimawuwid-dedanuxit-godibati.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/libro_epidemiologia_clinica_fletcher.pdfIn PDF document text
    • http://vvinorama.fun/tebujigowujisogujch78x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5ffb0a6ee6580.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/hiSggid/kolatobumonuta.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/hdmhagg/86395560799.pdfIn PDF document text
    • http://upgrade4me.com/rage_of_demonsss6qd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_602e215c34111.pdfIn PDF document text
    • https://cdn.sqhk.co/delinilipo/UbNj0zF/applock_fingerprint_lock_android.pdfIn PDF document text
    • https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/71d05.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/method_of_payment_in_international_trade.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/7057791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_600ccc54cc7b8.pdfIn PDF document text
    • http://mediaverifiedbadge.com/84742827232cn7dm.pdfIn PDF document text
    • https://vojerured.weebly.com/uploads/1/3/3/9/133999986/laxilenotarenarakize.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/72361.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/3Qhgiff/72823036103.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/suzixegazunow/nozexora.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/30019730993.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/pinuriwuzamuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/orbit_6_station_timer.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/easy_duplicate_finder_key_generator.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_off000108d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D9 5108 bytes
SHA-256: 26850cde768a776a6ed8df438aa6cd0bb60b59a8161d644485de75dbad6b1cad
font_01_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 11340 bytes
SHA-256: 7a5aa4f011fc33cfd693036e6ab1d5533ff4e696ab7b8b579fdafc23ce70a958
font_02_sfnt_off00014090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14090 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f