Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec67e4f6ff297da…

MALICIOUS

PDF

84.8 KB Created: 2021-07-23 07:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9a2f4e32a457a95101bc1bb2578301db SHA-1: 5f15c37325d460c938b98eaf33dc70df5fd7efeb SHA-256: 3ec67e4f6ff297da1021ecd8540a75a943af0e3decb186233baffd0110d6de48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. No scripts were extracted, but the presence of multiple external links suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://partnyor.az/userfiles/file/lexazebajexekusinomag.pdf In PDF document text
    • http://murito.fr/ckfinder/userfiles/files/7842141414.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/93023130149.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/72275706328.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/17663261472.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/9f0eca62c947bf031e3bd6be42c0bf27/porogubinujinanabajomepa.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/hrf79u0sdksos07vomf3cjfpc1/makogilib.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea70fe310a---wokisopiruzuwizorarak.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/42320860601.pdfIn PDF document text
    • http://juicewarenhuis.nl/app/webroot/files/userfiles/files/80506665099.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/55807927403.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/dokapodu.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/cf49398ee6d1bdef23424ce8238278d1/banoxazanifasawutiwo.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/768ca8da73ba1421f69996c1351994c4/32939179695.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/tthgs7gjhbhnm7ndetn45f1k9e/59398856984.pdfIn PDF document text
    • https://deepex.hu/hirek/files/dezeweboxazopize.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/nusodaraxujurexab.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c83038663---kitademujanujedavuzip.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/30563112795.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/64807062122.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0005840b27---20864399354.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/af759bf46ac5f6763bf2d46812095de0/74088922190.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/dowasovuropogasatofewivev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=fort+walk+in+clinicPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD191 10076 bytes
SHA-256: 0cfdf060203bb82c3e9dca2240a9200ac3d5de58c07fc10a2ca836c4e897866d
font_01_sfnt_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 17860 bytes
SHA-256: 9e402135701566286277e2c8bce42e54bb30c766b9acdb676b0d975595719b4e
font_02_sfnt_off0001175b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175B 16384 bytes
SHA-256: 6bc4420bbfa61156f096b6f0725168f8601d7500e332933a6f3144c23c09a2fe
font_03_sfnt_off00012da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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