Malicious PDF — malware analysis report

Static analysis result for SHA-256 60940ac0149aea59…

MALICIOUS

PDF

81.4 KB Created: 2021-09-14 11:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1721288863faec775a60cd17908688e9 SHA-1: 8ff67d0a1a68afa78f72bb32773dfba178d7d223 SHA-256: 60940ac0149aea596ea1670a70cf7bceb1cc770da8c19c5314a2ca508ecdcd9a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=inotia+mod+apk PDF link annotation
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/14193638290.pdfIn PDF document text
    • http://erictex.com/ufiles/files/87341873289.pdfIn PDF document text
    • http://floramarble.com/uploads/figuvetuf.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8ddf45450---77865890637.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/fogikapukepozesikofujova.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/gemofobunimanoreza.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/083f02cc07913d3267b05510d69dd5af/midedapuxob.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210908185704-weliwirezilofitosenogasef.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/zusopom.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/banitijeben.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/47201412231.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/59498992555.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/geginemedekuvexes.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/7405830475.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/7f8d2ce17ebb83dfcf8b88c824ea8a74/xesemesuzebukalaz.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/2170848468.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/9045955028.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613c45818b8de---xufanesavivagifomunu.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a906ec17a9---reluvojijebaporifujam.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/36870320680.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/95573714232.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/dotupobunegipanisom.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/subelefifado.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/90118660815.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_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 17952 bytes
SHA-256: bc69abbd2741720a32118b68989ed5e36b30f775c3883f2093df309a9f72176a
font_01_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BA 10152 bytes
SHA-256: 50b96d89f7b76f64bde7f0f11a50f39cc8ffa6ca8a7d2879f83ac920bcae6062