Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0cd9c6aadf50ce…

MALICIOUS

PDF

87.6 KB Created: 2021-07-07 02:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 52a896b3e7b90f83672726b026eba603 SHA-1: 75db7c66b224d79e54f6d47ded54ca18f7162ada SHA-256: ad0cd9c6aadf50cea188ef1742e094598a9603b97f0bd8246b0b5c8c819af7c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, and a visual download button lure. The presence of these elements suggests the document is designed to trick users into downloading further malicious content, likely via a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://infrive.ru/uplcv?utm_term=me+before+you+2016+full+movie+download PDF link annotation
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/losuk.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/b9c47933dc56587f494216df2c6c2a63/dugaxolubuvenafukimax.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/pogimibamejajilajoko.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/f54d5e0ab37ae5b2dd937ebb298e081f/tulizutafasidagudunawi.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/52792577469.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/o9clmrpik9nn0giplic9rfn1k4/13250401105.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/37375539004.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/e1b8d15498f3be28410d315c17e948f6/6035944104.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/75798844988.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16077806a86d7b---malobojepipevixilip.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/pamuga.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/bowiretorumo.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/retabiririvoveri.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/pevubejofamelugo.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b9012c2049c6fb3177d77c7a3fdd7846/ganirotisulobikidan.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210706_A402F808DA6A7717.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/4ca32c77ceb27e11e40be3e19f35b77b/66020558488.pdfIn PDF document text
    • https://togeltop.net/contents//files/devado.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/simimubokizol.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608800c81d427---totule.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/c7279e14c2e3221fd6e1fe9141aa884e/11888511057.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/dulavepodu.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ff93viq05o8e1go2jnsjhvn664/mufuzikeleratulufuzetup.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/boxepuluv.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_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 11212 bytes
SHA-256: e2371bb25aa58688770388443532b51e2259f33525b9d9017684c25d9a22cb39
font_01_sfnt_off00010be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F4 17304 bytes
SHA-256: 8f575ef58a8667c1b6f3d31f0db5cf3163d956a66a17c5e569060e565d44cccc