Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f138c777d0dd61…

MALICIOUS

PDF

93.8 KB Created: 2021-09-04 17:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9b5c24cef7b0d92aa92fa1aee371cfe5 SHA-1: d6c4452f7627ebaaeb7ec024d230250b23bb64cd SHA-256: 95f138c777d0dd61ef9c82322836b09db905e1a81e946914a50f5d629da3b9a3
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' heuristic and the presence of numerous external links. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and link farm pattern are commonly used to redirect users to malicious sites or download further payloads, aligning with T1566.001 (Spearphishing Attachment) and potentially T1059.007 (JavaScript) if embedded scripts were present and obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://majorsagilekvaros.hu/uploads/file/97516719739.pdf In PDF document text
    • https://sambelteri.com/contents//files/32446828684.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/zuravabuzefomijozu.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/22043788205.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/6a706264def5dd7a9de7a9fc7851a59b/93906136746.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/74782449933.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/9291947090.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/nafolapetik.pdfIn PDF document text
    • https://arerp.kr/data/file///69849179615.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/pc0uv29k2vnlapu29pub2bbpsi/figulutalarubep.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210606094153.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776df071385---61657597154.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11d2c2a415---vejajumupuxolezit.pdfIn PDF document text
    • http://aweibel.com/Photo/file/2913878360.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/39438050442.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/74797232799.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/37223939036.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/sowowugetefi.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/muwagimulag.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/10028255932.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe49833e29---xekanuxizubenibepuretov.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1a01b908b---30891362881.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba69305f023---zijagodifasidipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=pcmover+express+manualPDF 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_off0001073e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073E 19300 bytes
SHA-256: ecbb97e959c6a9c6fbb5c4db3f4b5ea06b5c3c21e8bad0e0a6d3215bfa2cb90b
font_01_sfnt_off000139c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C4 10616 bytes
SHA-256: 1d6f6a4178eca57c71457ef7c039bb3f9c6d89a037995afdbb49ea855943c540
font_02_sfnt_off00015216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15216 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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