Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8145dd07a3bb205…

MALICIOUS

PDF

70.9 KB Created: 2021-03-09 21:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01a1fe83090eec708aebc50c4c76f1b1 SHA-1: 0fe05341f8ec2f73e4ae402e654d5d3801337830 SHA-256: e8145dd07a3bb205e1d7a69fe6cfdca9ba4093deddab4d77d84458e22a3bbe23
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers flagged it with high confidence. The document's structure and numerous external links suggest it's designed to lead users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/award?keyword=advanced+computer+architecture+parallelism+scalability+programmability+kai+hwang+pdf+download PDF link annotation
    • http://tuvivukaroj.mygamesonline.org/argumentative_essay_writing_for_middle_school.pdfIn PDF document text
    • https://mapilezije.weebly.com/uploads/1/3/5/3/135322213/6d278f062a84c0d.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/how_do_you_play_speech_breaker.pdfIn PDF document text
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/maluwamew.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/waduwekilotag-zuvekumug-dononeme.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/best_reader_for_reading_ebooks.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/33671537228.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/4606089.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/67083284972.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/thiUjcr/42415290936.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/21408679559.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/65223641361.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/948809.pdfIn PDF document text
    • https://vulakesekek.weebly.com/uploads/1/3/1/4/131438428/wobanikinupiwo-gomanibudoxov-minopabuwenowaw-tetamil.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/dhjghic/learn_advanced_c_programming_udemy_free.pdfIn PDF document text
    • https://kavuxidawikux.weebly.com/uploads/1/3/4/0/134000359/9532566.pdfIn PDF document text
    • https://jigotofobab.weebly.com/uploads/1/3/5/3/135300724/801351a2d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://patepuxowibano.rf.gd/fonobizifurifikokuxala.pdfIn PDF document text
    • http://tirawuko.rf.gd/simirapuniwivepokifabo.pdfIn PDF document text
    • http://mutifesojare.epizy.com/piano_beginners_songbook.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/fiio_x1_gen_2_review.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/sons_and_lovers_summary_litcharts.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_off0000d35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35D 6016 bytes
SHA-256: ffce3af3681a3942321bb4b596e35acc8f65908516d532a44010cda71a2690e9
font_01_sfnt_off0000e7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C7 10992 bytes
SHA-256: 3a7b3c66f913948580c55c6e165ca5a3391e69f19a58f2e67365b3381d1963fb