Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa7e0d1521ec953…

MALICIOUS

PDF

90.6 KB Created: 2021-06-27 19:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0dee2253cf74b8ef33c1b2435fb3821f SHA-1: 64c91a87c251aae4a1edacc508c7f4f111dabaff SHA-256: 2aa7e0d1521ec953d9bc9233170c483811dcb1c0eb639b3449392ae3e1b12369
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised CMS upload directories, which likely serve malicious PDF files. The presence of external URIs and a link farm suggests an attempt to redirect users to malicious content, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/tqo3hlkiii9219s64lvntoi7f1/59944473661.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160715cccd8ade---77748651809.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/057a090f79b93c0030f9c8e138e8ebd7/23100046160.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/cdaaf114ae1c9904ee3fff9a97fa25b3/41681496595.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160819bc0bddbd---87795486306.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/f2b123c7b3958d7e267be541a26778f0/koxurosatiwitepa.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/2f4atisnkgvdputsmtv4vr9fc3/kapexunalewipugewe.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a6c4c637a---23499416993.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160972acfdda08---45556617038.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/741fb2312cd932fa69174aca9befc135/89968006539.pdf
    • http://noospc.ru/SITE/files/editor/file/51049091511.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/03ce62d2ea8ccc521ae3b1ed0b5c823f/gisemetes.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090ffed5e4a1---demedibo.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c227cb9057c---kurowajarazamem.pdf
    • http://fishtech.org/uploads/userfiles/file/file/56856590618.pdf
    • https://campermagazine.tv/public/file/voxilizusotawasunog.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ba4a58ecf5573dd818d871ad8607b2cd/nodegarit.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f550a6993a7aa4e4c176dbc7438712c1/77141336765.pdf
    • http://targdenunti.ro/userfiles/file/32254290033.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/b82b8d888911d140a3b5b68d923a694d/bavunif.pdf
    • http://sxhk365.com/uploads/file///75275774557.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/21566cdba120718cf1c329955c9a2fff/gufonoxumepakemusejedife.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9cb5a813bc9114b29ffd13434fc9aa30/83353237054.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/9926d1f99360a34e95655120b810c608/pikuvozasopotetukitapu.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/im16dfa2bstc5td772vhubri7f/73893306938.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1d2b67207---pulotizogop.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=abc+idiom+meaning
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e769.bin
f14e23f7468975a20c12e22570aa4247bb9155eda0603fff0d0ae042f73024cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 18576 bytes
font_01_sfnt_off000117e3.bin
fc96bb51e68212267b34b5acefce01e3ce1e469c7be8c0a453211fcdfa4f682a
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E3 16120 bytes
font_02_sfnt_off00012d37.bin
5fa867d79a5518097d56d59c6515ec02acf7ff882fa540cfcfbcd39357a6d93b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D37 10420 bytes
font_03_sfnt_off00014498.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14498 16792 bytes