Malicious PDF — malware analysis report

Static analysis result for SHA-256 493dbe4d38eca25c…

MALICIOUS

PDF

71.4 KB Created: 2021-09-06 13:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2af7cdfbb84d275d87e6f67400ce82db SHA-1: 5ac1c0d3b73fa34039e464004309ba04488e5734 SHA-256: 493dbe4d38eca25c908f2c046929a1c2b8d1d7f297e15fa236e11b9ba75ee293
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF's structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://infoenergie-loire.org/userfiles/file/83827771459.pdf In PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098baba8ec78---wisaxudokenudubujodawena.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/l2qa9iklnt06do7of6gt3s6qpl/nikekesoribulobizis.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/cbk2673dhqgdc0avia77i9dgs7/sebiraxupekitiwevema.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/82516339025.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/febagijegekawur.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/vagofazirogoxolo.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/22159820560.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/vedogazubadam.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/fibigujanixisem.pdfIn PDF document text
    • https://x-software.cz/data/file/guditomobinonamibefo.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/30ae41a3bd11eabcf98bf13fb2e436b0/10912626633.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8e970f78b---mokukaxe.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd7f6d1701---84601979800.pdfIn PDF document text
    • https://activepymes.com/pub/file/58340555883.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b84430ef38b---43206112306.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ic2dbecscs3rd8o7edsoc1kt13/riluk.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e6fe7ed1358---vominuxepujoxiru.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/33379909943.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/37fa19c84fead2ddf1e5fd891a2bfaac/13380705205.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ffc62169e81f84cbb06453abfd3c4175/zetagisas.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021961158448441.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795e6ae1c55---92726966312.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/fe046a9efd2ccadf7c1a54ffd7a952f9/56025418709.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/43349707780.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/5vi3scog3l327do0fjf2h1cm8f/78618800616.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=editor+pdf+download+crackPDF 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_off0000ba19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22B 14992 bytes
SHA-256: ad5750227d31b4c84d2160876301fbc845700919499969f39d3427c36c658187
font_02_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 10476 bytes
SHA-256: a91b7b6deb248c53f87de13864d0b6068e0e791e58cd019baeb773a9f8f14bba

Open this report in the interactive analyzer, or submit your own file for analysis.