Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e6daf424666e00…

MALICIOUS

PDF

78.2 KB Created: 2021-09-11 22:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: a0df8fc488ce1769b5858abf344e6b2d SHA-1: 51e8f049e77b0613aa0833e9dfbe55a3f6fcf9a0 SHA-256: d0e6daf424666e00cd75d5746472b68f4899c7d391eec215f014f6a6691ddeab
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 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=the+butterfly+lion+free+ebook PDF link annotation
    • http://litho-and-co.fr/ckeditor/upload/files/43204273151.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/gagoxatanewizemobaba.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/wubijaludumagijej.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/dibezuwiwaxogilodamaxeb.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/1333207109.pdfIn PDF document text
    • http://www.moyekolodin.com/files/72252283947.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/denuxipuvadamitizarelobin.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/kipeterewide.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/22812819400.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/nalifevel.pdfIn PDF document text
    • http://tamphuhiep.com/Images_upload/files/62767465341.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/newifaxajufesazudebi.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/84182513722.pdfIn PDF document text
    • http://bamor.org/userfiles/file/xogewazeranigolekoga.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/tumasuribemamenilabone.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/fepisowe.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/87128265323.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/81241805223.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/ziruzavim.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/kovaxof.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/8376504987.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zipab.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210906234803.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_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 18000 bytes
SHA-256: 727fde3eb1b7f4e7341324aa94c1531bdbe935c9baf83cdcdb670d0929da1cfe
font_02_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 10392 bytes
SHA-256: eee42107a8aafdec984b9de037f3d328d992f1110cb5f2dcae6bb85af2c1baf3

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