Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eca7cb7e8773f7c…

MALICIOUS

PDF

118.6 KB Created: 2021-09-08 06:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d2e4014f76aa3b48d820743ce523bcca SHA-1: 8ff6064bccd851d6875566b020d54c48b3f8f2fa SHA-256: 0eca7cb7e8773f7cf122455e6198e0ae8b5f804c6ac67be09c7fc30fc1763cdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dceaf040f---dolufowiweditupaledatuv.pdf In PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d67e54ed08a---lewujo.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/fofexazen.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608421f74beb7---gawum.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/gudivelubojekikurujoj.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/92688705028.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/madakinagutogunukoz.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/xubajevixowiges.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/27965180344.pdfIn PDF document text
    • https://fultoys.com/userfiles/91667006538.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4699670ad---93595682937.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086564a30a9f---zupabalesosupabukego.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/30939571768.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/60078137141.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/3104112275.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/jikapi.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/59aeae4a6b2c145cafe864479c94ea19/donezoludiwelutakimebinoj.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/71250787932.pdfIn PDF document text
    • http://108homed.com/userfiles/files/woxigimodakomefan.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/40821879480.pdfIn PDF document text
    • http://livestocktool.com/d/files/86520624861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=razor+pr200+pocket+rocket+owners+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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001381e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15035 11068 bytes
SHA-256: 850ff5951a9a6a82e966de99c209b03db944242b2fe71ac57ddd3b3ac2938145
font_02_sfnt_off00016a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A33 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_03_sfnt_off00018018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18018 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_04_sfnt_off0001889e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1889E 25624 bytes
SHA-256: 8f6406483bc9363ab1f0c3fc5d095191779577a7a3d6f2f12fe0abff75a78adb

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