Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe70ecd8d36303c…

MALICIOUS

PDF

70.5 KB Created: 2021-09-16 10:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 19bc7145ebd0a3817a5a1836bb451fb4 SHA-1: 8b6966823af184b5dc25bfcf87b1435805355917 SHA-256: afe70ecd8d36303cbf6799ec248ba59b56e31017e3e27cec111284bcfc1555a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URLs and link farm heuristics suggest a phishing or malware distribution scheme, likely attempting to trick users into downloading further payloads. The presence of external URIs and compromised CMS upload links points to a distribution mechanism designed to host and serve malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://oniceh.ru/uplcv?utm_term=mario+party+9+game+download+apk PDF link annotation
    • http://scuderieverdina.it/scuderia/userfiles/file/fesonapuxotefeze.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/migapuzozujewuxip.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210911013648.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/41793684461.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/23153491612.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137520b9be36---kolam.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/45567105249.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/zekosubowu.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/19310278757.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/59939168628.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/20290845379.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/xefimururatutexapomegem.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/rageboxewadusivikob.pdfIn PDF document text
    • http://zimmerei-possert.at/lowexewovojetot.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/1594370362.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e858903e99---boduvujupejujewudovixomu.pdfIn PDF document text
    • https://isuzuphonoi.com/data/dulieu/files/32668396641.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426708e596f---56803359000.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109131305287629.pdfIn PDF document text
    • http://alvitraders.com/files/26179420082.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/razosud.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/74082053074.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/netakoxawabagup.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/43514508418.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137347f73fd1---82340058284.pdfIn 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://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_off0000b494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB494 11020 bytes
SHA-256: 9dd81e831b8022dc3b2020c1eff628bc2793809d88bc71451e2eedf5a482ba1f
font_01_sfnt_off0000ce12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 15344 bytes
SHA-256: 38c0d13bed0778b2a336ea56e9ab23c1a9789be02dc883d901eca036b6900d54

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