Malicious PDF — malware analysis report

Static analysis result for SHA-256 22efaa2acb66012e…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 05:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 97d8d2692b2898eddf795864833b7a9f SHA-1: 6e92b4b26986485214d7b0afba77874ffe869fd3 SHA-256: 22efaa2acb66012e9d9bff07d9de505855465350c6a7dbe4c7374095a9d97ace
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm, likely to direct users to malicious content or phishing sites. The presence of external URIs and link farms suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=ingun+black+briar+marriage PDF link annotation
    • http://hasyo.net/files/file/gafogibir.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/tekifevutujizavuxuda.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/tudof.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/32964104174.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131343c6507b---foxoxa.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/83962912063.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/46000580159.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/37425886521.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/19470250272.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/tipumugewekisoxid.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/wisimigupugivizigemimu.pdfIn PDF document text
    • http://cissi.it/userfiles/files/nuduzebale.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130dc970a4d2---kuxiwoxofosizun.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141457d526aa---gubaxu.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210907061024.pdfIn PDF document text
    • http://ping-property.com/user_img/files/68785440063.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/fesajinewulazaju.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210909031102.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/jokuxonelevalasepuzegax.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/18088663204.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/lapak.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_off0000d4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 17660 bytes
SHA-256: 8fa88fecee750cedbd18bdb2c2f006fddd2eab1b88bcde7a3897e71ab89fdf45
font_01_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6F 10468 bytes
SHA-256: 707ca78fa2ac02eb1e4078d0bd3092068f54cb77c82b4cffed477d72ee1bcd00