Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d0e020747fd03a…

MALICIOUS

PDF

126.6 KB Created: 2021-07-02 08:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d3e8769e7af2792e3e33f197aa47fa9 SHA-1: 1df95f1dfd0c7c2cb76f50c7c6e60e689161ee1b SHA-256: 13d0e020747fd03a68568e392e86152a64da1425f0f928230d28a161a89119e6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to redirect users to malicious content or phishing pages, leveraging SEO tactics to appear legitimate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://pspectr.ru/userfiles/file/vexibixukobadipuwe.pdf
    • http://guojingmall.com/userfiles/file///burolo.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6bc8843a9---pirawola.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf9d3871d4---xagiji.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d900ca351d6e0caec6902ed736120e8a/fafaxewo.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/1c373edeabbfa26dbe97ce7cd445ff73/42676247260.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/tugolofafokakuzajimiga.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/843c33ee1ef7c368476c889f9e3743a5/farosodativitela.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9c7445c6e---jilurabatipedejubidorewow.pdf
    • https://schmitz.cz/res/file/kosawulovu.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/fexazejewo.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607594a10a0d8---kilagufom.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79b1a29130---kijusakulalazixasanisu.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0f7d558bb1f34773fd88a105af6d0843/37339242131.pdf
    • https://mongolia-volkslift.com/uploads/files/ziguli.pdf
    • http://grimastone.ru/files/fisevemuv.pdf
    • https://kingcarmotorista.net/uploads/files/rezomagozalo.pdf
    • http://erdivigado.hu/userkepek/file/xunojiwowivizofuzojofules.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/4bcdc11ff177c9d4399c651fe0ef49ba/79316654010.pdf
    • http://driver-jazda.pl/upload/file/67069306161.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/55e4872a58e4a23d4bc63fae627d0386/22108902924.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e6d2cd176---lawisuxasuxegexisini.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaef4f804---86009986326.pdf
    • https://ideylia.fr/uploads/file/22669864892.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=antagonist+and+inverse+agonist
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018ab7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18AB7 16792 bytes
font_01_sfnt_off0001a2ce.bin
d442f76ea079d09c0028b9705896391595903331dc3aa93c2fc36d403255c39a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2CE 10424 bytes
font_02_sfnt_off0001ba6d.bin
38fd0ba77507f1f7b7786a54c1bf75aa078463caca2e735aa140c46f7bbea9ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA6D 19388 bytes