Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0789c5c8e7b3c4…

MALICIOUS

PDF

87.5 KB Created: 2021-08-10 06:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 58bffb43fa3ed07daeccdd312b07f5a8 SHA-1: 903e6b1d6b05847d4bed518dba512fd185266e22 SHA-256: be0789c5c8e7b3c4167d6fa024bcf9f799f59bf9e12c7cd75219304571e76944
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous websites, many of which appear to be compromised or hosted on disposable infrastructure. The primary goal seems to be directing users to potentially malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://uhli-janmaria.cz/userfiles/file/15640185558.pdf In PDF document text
    • http://ei-windykacja.pl/upload/file/89853437597.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/8576363089.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/fukokajesuvap.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab9738699---xosebunasusawomotalijes.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abf9482b728---xamijagetike.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/181966l0iga399fm4pkmjc9220/lanex.pdfIn PDF document text
    • http://ucity1967.com/clients/f/f9/f95c10655bf48216a4b8c8e4321ec146/File/56459685322.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/fe67f16f1440b2a5c18bc412a279bdb0/gidenadinapufusokujoda.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa0655e7ef---gudugubanelivuru.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad484b96e3---fonulazozerenutupa.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/tawunexidixizipar.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3c5aee389---genenilakuz.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/zosiladadutogumogozukoz.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b53c9fdc---67731803955.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/36850344323.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc30d6b90---favig.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29d5f6d4d9---sivolilifubagimukovafimi.pdfIn PDF document text
    • http://nfc.soo.jp/file/fuxarakowigolo.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/pojorususofixi.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f05899880dfab7217b729c36688a7afd/bezuratevu.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/moledotilolejuzazitexim.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/99edl1doagh3c5c2oelovu61md/27641761076.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=minolta+dimage+a2PDF 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_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 10436 bytes
SHA-256: 929d78d12dda8eeab549f1d88b263a9518f9388a0b9e6860c0b16f35f349db64
font_01_sfnt_off0000fc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 22772 bytes
SHA-256: a5bced82dbed0dc752199863f45426b302ee97b94ace9d319de99da4ab1dc366

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