Malicious PDF — malware analysis report

Static analysis result for SHA-256 145409e387c51eaf…

MALICIOUS

PDF

121.5 KB Created: 2021-06-25 08:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c40f1991194d7be71d708a5b3f5bd033 SHA-1: 5222bd5c3ce64bfb2c4d382471ac051b4f7fce76 SHA-256: 145409e387c51eafd023edac39f334e288f5e414327484db4b710aeaaf930cc4
164 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is part of a link farm designed for SEO poisoning, aiming to trick users searching for legal documents into downloading malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing payload or malware. The presence of a 'download button' lure further supports this phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=bhartiya+dand+sanhita+pdf+download PDF link annotation
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/8u70i7hno70bsef4cfejujn8r8/zegar.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/178286b9e7e8fddf816e91a4acc262f8/degasutaxisogavivagiromo.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/xifigatutomuzomejevigeke.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/govefewisa.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9875d3b0307c3e6d93b9e41c1cc83b8c/reverorenafajo.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0602f083de---99560790316.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/20700873333.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/rotavosewukegusosaxozoki.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bba887ae4e---60269446884.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f243e18155---sobabusega.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/44d824aafad3078a10baca8a3e5b3d99/54411851793.pdfIn PDF document text
    • https://arzhosting.com/calisma2/files/uploads/10339084374.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/40bcda5932540928df471b80be56789b/89752255688.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074477ac83ce---mufabimefazodixejose.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/41009758821.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00019f81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19F81 18824 bytes
SHA-256: ca4a6d8a6d5a20c68ad1d26293ac6110ab79dbb13f76c69118ef96607fddb708
font_00_sfnt_off00013aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEB 5372 bytes
SHA-256: d0d7267903c53870fe440be8f3b6751d2c2267bc283584ac4370d6451aae27f9
font_01_sfnt_off00014d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D42 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0001589d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589D 2504 bytes
SHA-256: 2b4976bd5700831a6739eb7f99079ca960227e63ecdf520b00463d8acf8bf440
font_03_sfnt_off00016384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16384 10960 bytes
SHA-256: fc4cf21dd798a9d842756ddd4737f80e01d5ebd50bcf076af982889616df6fda
font_04_sfnt_off00018965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18965 16404 bytes
SHA-256: 75e6c7ac19c635a1dab7dbddd3ab5ee383da53f940e3c48986d7f576e2049f3c

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