Malicious PDF — malware analysis report

Static analysis result for SHA-256 8040c0f71137c96e…

MALICIOUS

PDF

88.9 KB Created: 2021-06-26 07:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1ba81a8ab1e9cdc1f38dd0ea57683f7d SHA-1: a3499faa339edc469539508400252df654fca725 SHA-256: 8040c0f71137c96e5c30972b2c24440ab3a82843ac63d27df342e2ca87fd161e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of multiple external links indicate an attempt to exploit users through deceptive web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/b242226cc6da74929c7370b5bab1c8e2/pixegazuneripiv.pdf In PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608086115f5d7---judaluwabisagavazonos.pdfIn PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/69787722097.pdfIn PDF document text
    • http://teplospectr.ru/images/files/1004629385.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0b2237ea4---90909832671.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c49411d2baa---21775988895.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/rodusabalesi.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea56644ad4---14345531629.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/904503cbcd54962149aeadc3005c8858/63725445691.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/tunawufusopazesurosol.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609efde30c685---12251365122.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/35da89ace56fa53241595ba671e2b0e2/42233648194.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/65630402611.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821f6753d83---daxawulomipigipusuza.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/topakujewufazemoki.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/fukasirapi.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca39572b4---kejovekumajo.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/ledebubu.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/sosozikedogujifisalaruti.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/61301508704.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/5dc34a94bc5ebf1917d35324fc460e6f/51054932368.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/r08hqtis0frq1hrpdp70jl0sjr/zekiwepopibaz.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f8223dcac---warozopugigapewezesesefok.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e096b9b94b---sanuminewuwoludegi.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/saxopugokujokifukelekazu.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/b50feda502376797220653401a0e00f0/68440094995.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/23077386587.pdfIn PDF document text
    • https://manenshop.com/upload/files/50340403045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=one+fly+over+the+cuckoo%27s+nestPDF 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_off0000f33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 10612 bytes
SHA-256: 1e316dfea01c67190a6a8aa57a53d933caa40379c52bda6166b92ca36a91f3d8
font_01_sfnt_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 19268 bytes
SHA-256: c4d200c42ada450915a6bb8cc1fb3fa0935c5d986bb29d8f42855fcfd4a9ac3d
font_02_sfnt_off00013c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.