Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b57dbf9b598a19c…

MALICIOUS

PDF

79.3 KB Created: 2021-09-10 09:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4363be4959391708f5bc049217f531e9 SHA-1: ad244a29ff75504b5b8db229c1bb55b94809c2e8 SHA-256: 0b57dbf9b598a19c81ac6f23f84805046a4f6262d21569875383111fd5e1677e
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=clip+video+android PDF link annotation
    • http://www.polni.si/Images/files/puvujibobulavinololele.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/161329ccc95412---41236295727.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/39463680642.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/dawaluvadomulowofipo.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/99122246459.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/padukitexa.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/85300354494.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/35941690734.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/puwefifipepajigojebibujen.pdfIn PDF document text
    • http://willbramephotography.com/rodusexaxajagagikipurune.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/25605632576.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/vidibemekudapag.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/26484883086.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/najopagaxebeliz.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/gurimegewewegosivetib.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/junerozerikemagoneku.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16134ebbf42c68---71713144282.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/34259304784.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139293572237---mexuvitukaxaxu.pdfIn PDF document text
    • http://darec.sk/files/files/82258971899.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/sipiselegadat.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/bipezivorujinawofasosod.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

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_off0000d323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD323 17636 bytes
SHA-256: 96f9baf2ae7658d808356ead3c99ddae2e7ed8ae2eb979f3bafa7fe25e154c5a
font_01_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 10216 bytes
SHA-256: a3b3888335a66875b299327c3b1a54c9b6b92327b2edc78048666c269a4d0b0e

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