Malicious PDF — malware analysis report

Static analysis result for SHA-256 67569ba9a9069431…

MALICIOUS

PDF

71.0 KB Created: 2021-09-29 04:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a9b4080765c550ababe30a8c9223d75a SHA-1: 21bae8b6dfe09583800129805ec21ffc5e69b20b SHA-256: 67569ba9a9069431f67d7b74e42aec8bb6acc1cde944cb819a02af2ca580c53e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://irlanc.ru/uplcv?utm_term=mods+for+need+for+speed+no+limits PDF link annotation
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141164c17f91---18710457862.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/79885433834.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/likomutoluxuwupa.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/26815082531.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/84484427799.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/8058710008.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/93493898257.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/zapaxatatefot.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4a74310f84b61f8da1190244738d1f2e/lupenujofegumunidi.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/brmilshkpbppakccmv9taqn0j1/sewazomifedobod.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/fafaxesaxanagotapanugebo.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/pobojoleketezuloxo.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109290543099145.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/kotifejojanoniri.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/gudelamapozibax.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614c8d7ba7750---roxotefipunibupogaf.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/14351094770.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/73021533444.pdfIn PDF document text
    • http://zuche0551.com/upload/file/71087491216.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491ddae3671---50065296863.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/godawetedefitobadun.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/41020695455.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210925101705.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210925170545.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/92314985230.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://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_off0000b26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26D 10488 bytes
SHA-256: 12074aad15172a298003b0f32990eb1e52548d882c02150241dab8eb17703913
font_01_sfnt_off0000ca29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA29 16680 bytes
SHA-256: 2d3c1612cee6a885348b39d6c7e27901702fb351a06248869508df20393bc394
font_02_sfnt_off0000f4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1