Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15070311f7abd3b…

MALICIOUS

PDF

82.3 KB Created: 2021-09-01 07:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c5c3b7eb77468de147fced0560462eb6 SHA-1: 9188b018ed1524fc0a9768defabdaa0a16d59ae1 SHA-256: a15070311f7abd3b413e95a9e029d8e503d264e7a99d16983409d3e6c99bc974
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The document functions as a link farm, with numerous URLs pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content or further stages of an attack. The presence of multiple links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d53c4d50c26---24972058022.pdf In PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a6b3f13ec---32513579649.pdfIn PDF document text
    • https://equalland.com/uploads/File/sawoduxanigujenanatepu.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/98835145510.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/naruraruzenolajeta.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160860ce104217---tamamef.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/17461252556.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/lukosuwefusinenigaze.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d49f444f44---wimawatesif.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/sukusotasagofojeruwu.pdfIn PDF document text
    • https://parkettworld.com/upload/files/20423773778.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/3ed7612c7f84c476394e8d46dfc7b8c7/givoxunal.pdfIn PDF document text
    • http://gardatrans.com/content/Files/tigogufedowabupoxasef.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/lesirimojugedus.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/80531634263.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5878f1d5e6---72270899652.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021070622045580554.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa45cd0ec7---notetofepef.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16084f005bfd65---lovurudijilavomerapupox.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/42025877020.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100b73460ee3---9099099612.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1153449ddc93dfff937d6a1102c521d3/durexozukomoniwutanusa.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/52u92ld7aiiivq30hgduc6qof4/40657072258.pdfIn PDF document text
    • http://mrsgladysosei.com/clients/f/fd/fd76c46f75d01f7adbe86f52c2a5b8c1/File/jorasitalakakofekus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83af485451---bojejinop.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/17672420523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=4+a%27s+semi+detailed+lesson+planPDF 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_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 19260 bytes
SHA-256: 3766dd841d7b486d1936fe16fffc963a68e9c27dfc4f8e025f0c136ebd8fefc8
font_01_sfnt_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001233b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233B 10468 bytes
SHA-256: 1cdbbaac3ceac15c7ad015be6c4c4e9d4cbabe1f95521f86e7edce4bb356bda8

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