Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8fa65d316a90f7…

MALICIOUS

PDF

92.5 KB Created: 2021-09-05 15:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 829304042c77c396181cff83e290aae9 SHA-1: b79a93f281e628d2e740d16e03fb2cbeba469620 SHA-256: 0a8fa65d316a90f733b46922834ff9904903c4223b2facbe956ad1ded1759703
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://d4squebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/nusakidoxituge.pdf In PDF document text
    • http://evevoyance.fr/adh/.-/file/bogavafe.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/duwos.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/88124132632.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/sixafakixovedo.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/vonosasutajeledulameb.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea9072af06---82202496287.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bde95f0395---menuwigimusap.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/73075001326.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/jirt7hlk1utm984m6tiok77k6u/melikowokabosaxode.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/32034596767.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/48369163877.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/fixanubemisusam.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/13893813860.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7756edf98b2daf15c3daea1048ce9a50/4067973810.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a22ad0739f---xifom.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/qvctjrhs2332l7ko891kgflt00/68866813224.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160766c0ce9299---punagasanisetagovuzawube.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/57263044086.pdfIn PDF document text
    • https://aaaxxion.info/images/file/28286622704.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/68418713058.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/27048361847.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0b70046bb---xonadozaliwefego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=imperial+70+typewriter+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F7 19432 bytes
SHA-256: 232b292b3ceff76916925ee939d99801f0095ab8ff81c7f892c9f0dc9cb71d40
font_02_sfnt_off00014b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B8E 10548 bytes
SHA-256: a48b2e55b5f53b78959ca8bb38e56213899f9711c73ee9a85006ab7db1faa090

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