Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd8d1405bba29f5…

MALICIOUS

PDF

77.0 KB Created: 2021-09-20 03:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a577cf72041c01a2287966945d11da6 SHA-1: 03e0dc7392a3861fa66ad910bb92986da5de0d84 SHA-256: ddd8d1405bba29f54e489d9d1de61e563eb3c916ebd0b93ef46fffbe724c7632
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of a QR code lure further supports a phishing or malware distribution objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://crysiq.ru/uplcv?utm_term=the+pharmacological+basis+of+therapeutics+pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/527aa48d75580c99eeeb0d25bae643f3/5014881539.pdf
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/vojiwusiguledijawifo.pdf
    • https://sokolzgierz.pl/web/uploads/files/rufimesoridifane.pdf
    • http://petukmahaaaraj.com/userfiles/file/39505782765.pdf
    • http://cabanagarden.hu/editor_up/tanoboxebogogezopawa.pdf
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/78328181841.pdf
    • http://molenat-energies.fr/molenat.com/images/editor/file/sopili.pdf
    • http://stimatacasa.eu/userfiles/files/rumezexafufi.pdf
    • http://dagmar-e.de/userfiles/file/gotepokilenazatupepud.pdf
    • https://o-dance.com/upload/files/17426539727.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/80131fe74a2598d4d18db03a8f28e19d/gotokemixotimekazovun.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/991c604a7f654d27b859affb9e24fa57/90284724362.pdf
    • http://mstreatmentadvances.com/userfiles/files/zelerilafad.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/m7k6p4oh34gqbvviuoctaa7hi0/29414003706.pdf
    • http://msnladyboy.com/ckfinder/userfiles/files/57172414871.pdf
    • http://helloshoppingnepal.com/userfiles/file/bukomo.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e4f9349ddd69fc855f7471a1837277c5/detumokaramipezekiju.pdf
    • http://nuestratierrapremios.com/campannas/file/11158578386.pdf
    • http://axwelindia.com/uploads/sazojetime.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/54731c4b6e90ede14957fe684c8dd710/43596830588.pdf
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/92288519316.pdf
    • https://megatekspb.ru/sites/default/files/uploads/puxopedoruwogemotizotirag.pdf
    • https://vitanov.rs/files/legajovumokusujinit.pdf
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/newefirubes.pdf
    • http://candientuvibra.com/images/file/suxararijuzebunufibapibi.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebca270bf4---97862957269.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130ae90763d6---91215181419.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/5v5pptetb36oma6jauur2cnvjt/721608369.pdf
    • 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_off0000c7a7.bin
685d453bc6271ad48c86c82c21557fdd2b40d1a161d078aeffcb4b7ce5be1fc7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A7 11168 bytes
font_01_sfnt_off0000e152.bin
442d5506456197661496ddaaeed1b77d85d603b4b8b7f1b5b97d9455e93990da
pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 17148 bytes
font_02_sfnt_off00010da8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA8 16792 bytes