Malicious PDF — malware analysis report

Static analysis result for SHA-256 49be6f2d2b5e5b21…

MALICIOUS

PDF

89.0 KB Created: 2021-03-27 20:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80c8a2492f504d5f182d0376adba0080 SHA-1: d0b1b7790e8e91d6e1369c51fc4b726b7303b3d3 SHA-256: 49be6f2d2b5e5b21bfed4c02397e640a2713b274984eee389dc2e2d1226fc6c6
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to external content, likely for malicious purposes such as credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/award?keyword=barracuda+email+security+gateway+300+pdf
    • https://cdn.sqhk.co/xixofivib/Ehbifhc/7384211974.pdf
    • http://kasyanbeauty.com/customer_journey_map_free_templateoj7od.pdf
    • https://weritudasokapo.weebly.com/uploads/1/3/4/4/134494226/2860061.pdf
    • http://forijezuxo.22web.org/jumobatizusazuranu.pdf
    • https://cdn.sqhk.co/wabogojo/jj6jed8/ridagazaba.pdf
    • https://cdn.sqhk.co/vidujubotaf/idigNok/electric_guitar_starter_kit_reviews.pdf
    • https://tevitoretej.weebly.com/uploads/1/3/2/6/132680933/xivejejat.pdf
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/pixuxa_jimaremenujen_rudixi.pdf
    • https://cdn.sqhk.co/furaxofir/Vk5ihjC/the_galaxy_survivor_apk_free_download_latest_version.pdf
    • http://astrohelp.space/27126917641ore6n.pdf
    • https://lisobigu.weebly.com/uploads/1/3/1/6/131606175/57071ae8e194c.pdf
    • https://bozaveruri.weebly.com/uploads/1/3/1/4/131483492/4687842.pdf
    • https://cdn.sqhk.co/tamejenonisi/idjfCid/fafojuxemiruguluju.pdf
    • http://sukuzarimeke.22web.org/luperufobuk.pdf
    • https://zunexoxefa.weebly.com/uploads/1/3/5/3/135340588/refututanisezuj.pdf
    • https://tigoxugijiwubaz.weebly.com/uploads/1/3/4/3/134315710/8272758.pdf
    • http://sarhello.online/zipafesowenapijudetobunuz2erk.pdf
    • https://notowupoguja.weebly.com/uploads/1/3/5/3/135316513/vokukodarenir.pdf
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/e5a95dbad41db19.pdf
    • http://gebajajax.22web.org/who_were_the_smartest_guys_in_the_room_and_why_were_they_called_that.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kisimujuk/how_to_create_a_timeline_in_word_document.pdf
    • https://s3.amazonaws.com/wolina/tadakowebewarepakula.pdf
    • https://s3.amazonaws.com/vuxalirudidel/disgaea_hour_of_darkness_leveling_guide.pdf
    • https://s3.amazonaws.com/benubapopikaj/kogilolujizegurukudu.pdf
    • https://s3.amazonaws.com/pisik/malayalam_movies_2019_full_movie.pdf
    • http://pazatirademe.rf.gd/89101758337.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a57.bin
509762892e73bcab7c62d3800e3b5ec256a84c899168aeae4307bf08cde1f3aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A57 6024 bytes
font_01_sfnt_off00012edd.bin
6e56030af0924404e9fa91d426ff8092ac81358640d60386231b9581375191f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDD 11080 bytes

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