Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6c0cbef2a04594…

MALICIOUS

PDF

84.4 KB Created: 2021-09-10 07:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b60bc30ebbc3476ac97881e29ee811ed SHA-1: ce445269ae927de4c0571a13d7447eccc5c8a49d SHA-256: eb6c0cbef2a04594d5e57296e98f5bf140dce3e513df60a95fbb6163188c32e7
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by 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 0.9977

Heuristics 4

  • 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 http://urotunisia.com/uploads/FCK_files/file/7544056233.pdf In PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/12570853305.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/30682101062.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/netetemufopunixatigawox.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/93444424912.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/72139520343.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/17502354393.pdfIn PDF document text
    • https://tavio.ru/files/file/9804006886.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f7479a4bc---99458592297.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/tedixixibaga.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/tosexemamoxelenigapalalo.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/71547106157.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/11520585002.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/gugigejebanogiw.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/woreji.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/108278691.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613685c9eed08---6460506060.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/70712607744.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/jezopuniwusedigokutepu.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/gejum.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/zawasutadikowajomisin.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/36892575538.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/73063606769.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fifa+21+highly+compressedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 18076 bytes
SHA-256: b7acef62efe5f629c25063e270596b529833c25a5a46300aab32bba14ebbfa8a
font_02_sfnt_off00012a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A21 11128 bytes
SHA-256: 0265bfb4306a1a5b22107c72a9534812b57b66141ad94527625da52bc6675e77

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