Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd112c9edc16c42…

MALICIOUS

PDF

81.2 KB Created: 2021-09-04 04:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 53dddd4e75847b034f85d31408d5a851 SHA-1: 57af66967ce1a9f904b85b0443ebfc1b2ef2013f SHA-256: abd112c9edc16c42a7e742686a61421d9a86172f55631cced2ae2eea788bbca8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised or disposable domains, suggesting a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were extracted, the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://mispuntossaga.com/campannas/file/witomojaridiweruv.pdf In PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ca9cdbffb29625503b0f0ca54455ae02/zepux.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/56095239282.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/gimelurosomifasozipusuxaw.pdfIn PDF document text
    • http://teraval.cz/res/file/garujederokunivapoponisi.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/meloxejibilonotokel.pdfIn PDF document text
    • http://deckdreams.com/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/rexesulimojatob.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/vorowakapi.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/30467396788.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/m1gjcaato4e3lcieugn1snqo82/57252054683.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/vozofafupurafezapez.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/wonadavobofedo.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b0ea608c---92510473598.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/59869359763.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/lukepimufubop.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/86904046587.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/bitumegamot.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/uqims33is9e5bpejrjrstvseo1/kupesogutudinakam.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/lixixumube.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/lotavuwomipotamebabebiki.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/63164752289.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/ridabarukipebixomakotenop.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/s0019ccvv5ptfvsd2i62be00u1/89021637984.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=if+clause+worksheet+pdfPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 16980 bytes
SHA-256: 8a5ed35b403ab4bcf671e06c13ede21876945227e0ea369538cd0dff06eb47e5
font_02_sfnt_off00011e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3A 10752 bytes
SHA-256: 23495569855c12f541c97ee3c01d1542934b3b29a52e88ddce93dbd4b44e5cf5

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