Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f24b6ee07bb28d…

MALICIOUS

PDF

158.0 KB Created: 2021-07-05 17:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0d59bbe4053e308261f4467a34d535c7 SHA-1: 17df1a40b8e391bcdef166d4ebca45f7ab339770 SHA-256: 80f24b6ee07bb28dcc3d215727ca2b6b4f9fcc182f43fcb166f86ccd7ccb9582
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures to trick users into visiting malicious sites, potentially for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://vector-luczak.pl/new/fck_user_files/file/29425230266.pdf In PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/df2c2568b2184e5d0cacdfd212ff1e78/gupiloxitemarunu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608012b7d4de0---fofetomulan.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160be909fa85bf---34952642273.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c5b6168f---29785799204.pdfIn PDF document text
    • https://proia.bg/userfiles/file/pevafosizuki.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607921a2801d3---paputoziwin.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/luwugenimavifutotezikut.pdfIn PDF document text
    • http://sciattella.net/images/file/ledogukawofasef.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607029269a775---gudebanuxosojisabelebulon.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/bbde7938363d03ef9e2de52647108f33/vuwurijabadikabeto.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6cc54371f---69350543282.pdfIn PDF document text
    • https://micsys.in/userfiles/file/64541586774.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607129df0426c---33529576278.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f63d6bd1d---xawola.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9e4c82f42---75434408926.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/41005453316.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852e72e8ab8---42658741472.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/88154380777.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/29ecd8616da499b3940aa1d2ee1a61ef/86065662749.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/plte0rr5bujku4ho74ht8qicf2/xasetaganuvikonile.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ofnd71slp0bv8drroope4tii9l/rulewozolugovabejajon.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609048222dbc9---soluvubasurifut.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e8c8b9ed860039efc31e0c738b93f188/favutinigejolizular.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/7035a5e30be1770161ce41399872d20e/fobeguzexagalogiwev.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d22821cf5c0---juxafomova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+story+of+dr+faustusPDF 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_off00020d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D03 17384 bytes
SHA-256: a59d0cd8f7547aee529084b1e0c1482004f14f043b6bcf7e2ffcdc2b0df78589
font_01_sfnt_off00023a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A5D 10388 bytes
SHA-256: 4ec2f9cd544f4ee3728bbc4de6df048df2fe9aa1c50e67c488e901566f8a1c02
font_02_sfnt_off00025218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1