Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63f009eceaced48…

MALICIOUS

PDF

85.5 KB Created: 2021-08-18 12:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6f17a96ad39ebe5b3db2a57b5f30984 SHA-1: 3f43f54df80786058188cde258427b800555633d SHA-256: d63f009eceaced48387168802a2f666bf7ebf454a2310c6b344aa56085dceff1
196 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://catamma.ru/uplcv?utm_term=biblia+reina+valera+1602+pdf+descargar
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/11d761accd88d8c9e27798419b4b0dce/89206037379.pdf
    • http://dentalclinicbangalore.com/uploads/sejozizadadafizipi.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/jedapuzix.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f51d19ced3---jikuvuxalusosi.pdf
    • http://aybar-gallery.com/userfiles/files/61338472483.pdf
    • http://delvalle68.com/clients/54584/File/tirawixo.pdf
    • https://rjpexport.com/files/fonij.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e7db472d070---nanasawezaxitajukeferuzi.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bff584151---11667810384.pdf
    • https://ancoraeducacion.com/images/mosukovagusunulad.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/piduvijokitowozevu.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61b4ed42c2---74665826129.pdf
    • http://www.tomasjelinek.com/img/pub/file/70586102120.pdf
    • https://isabellepieman.com/userfiles/file/kutijutawunofagaleponet.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/2d56ebaf632d7ff3724602eaa0fdbc9d/nuxigisojufufapikidisufum.pdf
    • http://bdn10.cz/files/file/benapeginikeb.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/julopizunuwa.pdf
    • https://lesfeesdelhetre.fr/upload/files/sadidurikes.pdf
    • http://nomorecpapmachine.com/userfiles/files/powunedidobutugag.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607220dbef280---pujinamulilizo.pdf
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/wojizigodezijofu.pdf
    • http://abwingsmd.com/uploads/files/taxokoxoderumetawujizavux.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610735f08bc18---68631857628.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/36c45e4fc33fdd6f8a4d1b379f33a5b7/60867598674.pdf
    • http://e-cluny.cz/UserFiles/file/52073677878.pdf
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/julemadupobujamodajudapem.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_off0000e4a3.bin
42da019b9131c871157fef7d77060beb8de5d44a6cff700762b32fb197b90de2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 18656 bytes
font_01_sfnt_off0001134a.bin
b2616103c80f16f33f190587f74b39c881003663602c185b6382bf1b6ee3252c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1134A 11296 bytes
font_02_sfnt_off00012da6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA6 16792 bytes