Malicious PDF — malware analysis report

Static analysis result for SHA-256 2082167922ec2756…

MALICIOUS

PDF

90.0 KB Created: 2021-06-26 03:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d414f12b7e5bf44a697921df638ce836 SHA-1: acbc9e1710415331f9bcf8a9a6c60219b3fe6628 SHA-256: 2082167922ec275621da0f0c81b023972aa126451b1e4366734bbb5abfb5ac09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9978d4e30---wogugitagurifepinozobaw.pdf In PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/supowafogalimi.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/18507652197.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/849ahjl6momiunntbifvsnmh0h/31415927788.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aee131d6a6---zugitufiwaz.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/3ea4dd0faa76e1e5a71241cb090d3a65/movujotovub.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/fb7mk7p56ibhr17ar1g1pd6pud/83570062894.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/majusasenej.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/pifolilosizutijawofana.pdfIn PDF document text
    • https://aneri12.eu/res/file/54234082458.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/momaritetewibirakupibi.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d0fc579277213d2e2af7011c43a19835/tazegi.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/d3o2l0r676qur81mo5tvr9lpp5/robelogakunakevideded.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/7b43b1eb30ae5bb312356932b6c821ec/45877839183.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/18547343874.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82de4d1840---58421126541.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/nekabasabujokarakilafepep.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098806907093---60964345180.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/89475732875.pdfIn PDF document text
    • https://kristinanamaste.eu/files/49996848984.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/2ebdeae91475df2fc8cd22c245e9691c/xijopizulixopejadefizew.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/86289d2cbfddab6a1b0e189497f8c200/28301158107.pdfIn PDF document text
    • http://texmet.pl/userimages/file/famuwokos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=spoons+and+forks+are+calledPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 17784 bytes
SHA-256: 3f735910be194bb5a9de3ccb6e4e225ce62cfb124a8c5ae804a5bbd45749d4e5
font_01_sfnt_off00012928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12928 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001413f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413F 10588 bytes
SHA-256: e6155648f2b8f2554ded26b4df6ccb5ef1a89189c6807ff7b43482298b041ea6

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