Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1295a5bef7be7b1…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 01:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ee48addf69d31de5a04d944217147edc SHA-1: cf415870486970509cca7d13c7459f589f054472 SHA-256: f1295a5bef7be7b1e31a8d1b3af47334e98f594dcf6b16ac9270e2a3c8c039d2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on potentially disposable domains, characteristic of a link farm used to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://floridainvestment.cz/files/file/wodazeduvaniduguxosapa.pdf In PDF document text
    • http://derma-dts.de/files/file/6442264355.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a991f37844d---43018334959.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/vazenozamevabobaxivero.pdfIn PDF document text
    • https://rivnerun.club/images/files/sakatopejaxe.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/xapuwovan.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/gutizuzikawopukagufa.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/57261775411.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/dasiruwunotenotigidufak.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/jizelavovowut.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/43aef7fd56f8b94cb12dda8070bb8778/zenezejoxexesijaku.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/tusonesukal.pdfIn PDF document text
    • https://luminex.pl/upload/file/binezisuv.pdfIn PDF document text
    • http://www.seja.lv/assets/ckfinder/core/connector/php/uploads/files/fugosofumilidarozanufumub.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a684a727f22---ribuwadagodavobilozikijet.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/42438487916.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/65472081265.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/81578909559.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/reforokam.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210602064316.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099efe0c7c84---terizotavoxafefuka.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b324364bde2---7835031655.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/kisununida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=botika+ng+barangay+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB2 16652 bytes
SHA-256: 6d36e43c71402874d36620a490dcaaa59ecad4c197a7301c6dcfef4a5c157ec5
font_01_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 10728 bytes
SHA-256: d389bbbe4905241e2fcc22a80471506d58afa28da3196f974f3f1d8e5ac4582a
font_02_sfnt_off00011332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11332 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1