Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e774462e839e5e…

MALICIOUS

PDF

83.2 KB Created: 2021-07-20 01:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2c4e9b8aa7904c7cea6193f5fa205dd SHA-1: 3fbcc60b5d59fba73a77ac163296549065962892 SHA-256: 67e774462e839e5e0f5a9fe5eb4f7921de803bdb82166a65d021beadef58b3ad
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly supports a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://phutungtdc.com/upload/files/xuxizorudaliwipu.pdf In PDF document text
    • http://npi-management.com/ressource/site-image/files/4940631770.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/texujuvagofosiwifojipa.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/7131394462.pdfIn PDF document text
    • http://innotack.com/userfiles/files/jirege.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160805e202cfa9---35284481590.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d7579f689---23888776343.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/et109ppenffo7lrq7aajhi2avd/81144902286.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609de711d6ca7---nanam.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/fivororilokukejijobi.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/dokedozosugatisis.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/vifagufusizuratogo.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/nokoputovudosanezu.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/39087204779.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/bakubovukanizimuzuzazum.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7ddc63776---83453938429.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f4e1b080d9b---baremefewigamobuwobixewe.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/38720870704.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/xodatamewegedopenakilalu.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607acff2c9941---29221762529.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/724544574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=daniel%27s+prayer+answered+in+21+daysPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 16728 bytes
SHA-256: a44ab8d58273b83bfb9e1224ea39a4bf0e5524759881e47bd5e1ef624ba87039
font_01_sfnt_off00010f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001275e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275E 10572 bytes
SHA-256: 0ac8f56d1ef4506ffe39b33ffd9eef02725336a8f1a9c3ade329fc5936403e0c

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