Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dbf043787e014f…

MALICIOUS

PDF

87.8 KB Created: 2021-09-02 22:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2fe6223552b8b891e8802167192cf40e SHA-1: 6e86808bac64acd4260dd859fc1824912416dbc9 SHA-256: e9dbf043787e014fcf14088f7d4ed953a0125d9684aa4e0dad3a8a770167b45c
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs and links to compromised WordPress sites, indicating a phishing or malware distribution attempt. The file's structure and embedded links suggest it is part of a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=angularjs+pdf+creator PDF link annotation
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/13037883268.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/62302512375.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/53533781986.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/fuwowipog.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/96292500838.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/79449981536.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/dm3orvgv8uqt7onrs00fu3ev5j/27436737441.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/gesazepapolijipe.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/21991534171.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c127cd601f9---80649163100.pdfIn PDF document text
    • https://jotelek.hu/files/file/74448690925.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i717a0636otlimrikl7rfuu5te/girinosozaworotu.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/lejonokowiso.pdfIn PDF document text
    • http://dietmoitangoc68.com/upload/files/sarulawipigakowagir.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/vutedasi.pdfIn PDF document text
    • http://slsnn.ru/content/files/tavaru.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085362093318---67222738308.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/79807125790.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/8ce99f444dcdc0f6bddfc7d3a59e7228/domogavafukiwemuxodin.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/kewigone.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160dec75b232fd---93256673957.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c0c9dc63a---misunivinoriziv.pdfIn PDF document text
    • http://zgic.ru/!upload/files/69555388029.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/89943571791.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_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AA 10916 bytes
SHA-256: ac0a563cdb8ff547d5e4a5dcca851fb5710592c78d201ac6407a11fb63a3ee28
font_02_sfnt_off000120f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F6 18600 bytes
SHA-256: 61dd740ba6aed37c87716814d49c90da7c658cb1762baa2c07992ac13d271d18

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