Malicious PDF — malware analysis report

Static analysis result for SHA-256 177699e82fa15ff8…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 06:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bed8187e76b22039a542f3c599c37b1 SHA-1: 94a33a6dc14a13a0cee52708f346269ef22e92ce SHA-256: 177699e82fa15ff8d5c17880bee5e7e6edbe4930d8690a79f4a0b60250d4bf84
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. Analysis reveals the document functions as a link farm, directing users to multiple domains, many of which are hosted on compromised WordPress sites or disposable domains. The presence of numerous distinct hosts and UTM parameters suggests an attempt to obscure the ultimate destination and potentially engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://project-lovcen.me/userfiles/file/50573699449.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/mjkmm1mbjkilmfo2c44hollunh/senizafajologufe.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d85f59955a2---lexomekuxetalutawunixi.pdf
    • https://latework.cz/soubory/pagalivo.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/d9aa211670b55dfb90c9b669a96760c1/forikivepatak.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91b0470ec---filubanonisemivogipoku.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160daad4fdc348---22170938452.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d7c895f34---zetifevomanijosavuvejam.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/383a26b84665db5d6f1404b503ed2d45/38779648383.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/481682243c1cac30dbb816e1776a47f1/14853574172.pdf
    • https://healthcareadvisorsgroup.com/wp-content/plugins/super-forms/uploads/php/files/o4cka73dl87ps2epo6uu196qk2/xezegegopijotem.pdf
    • http://hainescentreasia.com/images/file/nafeganoderufozego.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b92c0f3a8b---fuxobitedorajagivunobogi.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0a414653e98aeecc99beb0479bd09d9f/pulelerawoda.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7d6a64a53---budewire.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9295385ea---famuzinamisudarijo.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095e94c79d53---55829491520.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/79c8b48144ccc74f6bc5f75556982b12/lajaviloxavaditigaxupiri.pdf
    • http://turhantur.com/turhantur/files/8925855916.pdf
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/mulekekeribixola.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/826c6bbf8fabf0fcb0295bb5398811d5/12870161264.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da6749bb12---jotokakeforezubiximuwimo.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cfdbdfb27---79393443079.pdf
    • http://juicewarenhuis.nl/app/webroot/files/userfiles/files/56891034919.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=meaning+of+being+woke
    • 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_off0000f276.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 16792 bytes
font_01_sfnt_off00010a88.bin
9fcdae0cb82adc2546d1877a70c5b6e97bfd1c4c643b9899084dc48fa06c1c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 17520 bytes
font_02_sfnt_off00013842.bin
f64bb6852e958dc249bf9cdf793582228351a4298a59b615f6913b1fe127a2fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13842 10288 bytes

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