Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e456ab3da5b6ef9…

MALICIOUS

PDF

174.4 KB Created: 2021-06-30 16:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9535b3c0378d8137cf2723a6155b7b9a SHA-1: a0652a1c3da6b37888d5f5e2b8d373d654e5f143 SHA-256: 2e456ab3da5b6ef97e127109ab97359704dbbe741a31210bde5816229e8494e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware. The document body was unreadable, but the presence of many external URIs and the compromised CMS upload links strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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 https://chcial.ru/uplcv?utm_term=probe+over+meaning PDF link annotation
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/5a9e05b167f3ed4cd768d3aea7fe58f8/salelikawetonivonoga.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cddc72c98---xozakapu.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/dk3o0atcjo93if9i2f923hnq06/runujafumaradikaxukew.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a23a9cf62---sajazazilik.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac6a0c0546---fidoferatagijitagete.pdfIn PDF document text
    • https://defaico.com/d/files/sifebelutoko.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f2885eea5851688fddca1cb0c8833c66/75746334654.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16076b57a62292---79634847240.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/63988190602.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/vg6cs9tkv95i6a095j6ik9pq7e/88124316257.pdfIn PDF document text
    • http://firegallery.ru/img/upload/53238236179.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/s92bfi8qh60pkb7k462f83jj70/45000000647.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/eaf76082253877dea08cab583b036ebf/kixononozadawogozekez.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/55666112008.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cfcf7436353af76b47a7821b002c5bfc/kizalapovi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b68aa710c9d---81930137157.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b970d3c3dc997bea4c3638a779f8a68b/zajimisoradizewubi.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7992a148db---28798674804.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/7c4b5bdbcd789a7b4c2d6670e7fd290e/96642672117.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/77226684359.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084b06fa18cf---93561631408.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/65576116181.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 16184 bytes
SHA-256: 2161e5d32329f6537218d649da84a59973eb54cef83712a7c6ed9348f72386a2
font_02_sfnt_off00013ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCF 10344 bytes
SHA-256: 6961fcb802f8452d262ffa115bb2b2797029242aef57c28a0185b42a519973bb
font_03_sfnt_off00015419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15419 140288 bytes
SHA-256: 553530c6fc34ec13dee2756dcfe6173de25bc773aa17060cce65b9430f85a94f

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