Malicious PDF — malware analysis report

Static analysis result for SHA-256 2741e4714af312fb…

MALICIOUS

PDF

80.8 KB Created: 2021-09-08 13:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c90074a7efe9b0817959a13bf4b0bea7 SHA-1: 563c99b6faf45a6426fdeb0ac313509b70ebf358 SHA-256: 2741e4714af312fb7a66fd5b97b006343c420eb6e37cad00533569342a7c188e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ietc-oman.com/userfiles/files/bewelevakuraw.pdf
    • http://mstreatmentadvances.com/userfiles/files/resewakusozenepenet.pdf
    • http://samurairamenbar.com/uploads/files/fubilon.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeecdd46b7---zulenigavexixesupadowite.pdf
    • http://riccaassociati.eu/userfiles/files/93728009221.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/qlerhojuojb7las5kef0ii0ue8/gizomabazikawunesinufixik.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134dbe86364b---1470667217.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/7eb00a8b8301fe5977a113f6aa7ed395/70123378425.pdf
    • https://nordavril.com/userfiles/file/susovatogomekamivezo.pdf
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/guriginijasoxisu.pdf
    • http://fukaofoods.tw/uploads/files/202109081313084847.pdf
    • https://denizlihorozu.com/resimler/files/21977142568.pdf
    • https://oklogistic.lv/upload/file/morijotozuri.pdf
    • http://mientaytourist.com/uploads/files/82484209948.pdf
    • http://cuadepthanglong.com/images/ckeditor/files/13592075218.pdf
    • http://vinhomeshaiphong.net/app/webroot/img/files/sufopevejozemej.pdf
    • http://tecresconsolidamentorestauro.it/fck_data/file/wuneb.pdf
    • http://citty.org/images/uploads/file/gitimebejoxixowokerif.pdf
    • http://tianlanlawyer.com/filespath/files/20210905140854.pdf
    • http://tokstar.com/_UploadFile/Images/file/25375823284.pdf
    • http://vagtteam.dk/userfiles/Files/84556798030.pdf
    • http://vasekurzy.cz/userfiles/file/vimetipoke.pdf
    • https://agriturismoilcolle.org/userfiles/file/mudasonep.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161328e049ebf7---45017369289.pdf
    • https://inprovitperu.com/ckfinder/userfiles/files/25303845613.pdf
    • http://cs-web-design.de/ablage/userfiles/files/kodireraguzorel.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=prep+guide+to+bitsat+2019+pdf+download
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d255.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD255 16792 bytes
font_01_sfnt_off0000ea6c.bin
a693680991844fd0b0076e8e3c23d5936aff1dab00b3d2613348dd9f88edbfe2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 11460 bytes
font_02_sfnt_off00010555.bin
4408da8e4d1777a06322c748539612a7b27d49431423c19ccf955bb9af3e44cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10555 18584 bytes