Malicious PDF — malware analysis report

Static analysis result for SHA-256 268b5b1c352a45a5…

MALICIOUS

PDF

83.1 KB Created: 2021-08-08 23:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 652cc5adac071da5d9e48374d78735c9 SHA-1: 6a5f15d751e1ea30da3795c9f3d25783f57372b7 SHA-256: 268b5b1c352a45a53b6cd24902d43357670d0154f263397889c8c074115c4e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/fexarupupovilimefulire.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/f728i9r8tok3muj55m2khtiol3/togokar.pdf
    • http://gurukripapublicschool.com/userfiles/file/74843004640.pdf
    • http://softwarefactory.nl/images/file/zejotufevipegodepakanupiv.pdf
    • http://pn-tech.net/userData/board/file/xupakamonotezej.pdf
    • http://lab4050.com/upload/editor/file/jujeko.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160783285a9ea4---zinufijidagavok.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2e5d0a16c2c0bcc1798f166e0918ff9c/20296883733.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ggksbdfn21ma9sbk1r55b1la9u/39359064766.pdf
    • http://katachizu.com/img/news/files/57864065008.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d67eb6c8a9a---22521927206.pdf
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/25561340680.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab94597f20e---92255005387.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7cmbhpn27cps8top9u2c0nuef6/disaperivedemadif.pdf
    • http://nenkin-t.com/upload_img/ck/files/17188269058.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7844a7091299c8fff0f0af198f50f513/90874884602.pdf
    • http://upasamed.org/Content/uploads/files/92240004662.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/5d3034f114daf1778e254e39410009f3/jeguladudamojosame.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160728e662566c---lodijazitegovezekupikek.pdf
    • http://granite1962.com/clients/869125/File/pojazutijunasedavoto.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/e9a27363ce6305c024d36a91a5afb103/61184004347.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/magv59b4e3rhlv9p9a3vnmurnu/77396546689.pdf
    • http://kolasinprevoz.rs/slike/files/semopozevuxave.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/sotojafupupetixudifum.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=m+advertising+2nd+edition+pdf+free
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc43.bin
7db23127f6f9382dca994080bc3c66823807423754ebfdff1b54352d4ccee769
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 10804 bytes
font_01_sfnt_off0000e528.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 16792 bytes
font_02_sfnt_off0000fd39.bin
a79c9caf7d9fe7d7e6557dd08284a48a0650ee9668136fadcfdab94fba17ddb2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD39 16084 bytes
font_03_sfnt_off00011269.bin
8d78ccb0295ea49760c6fdd84dab0330849882e6a37b0c31d783dfbd90eb5787
pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 16680 bytes