Malicious PDF — malware analysis report

Static analysis result for SHA-256 301ea1259180f83d…

MALICIOUS

PDF

73.7 KB Created: 2021-09-16 19:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 886d4137eadca57a23fc6961b42132c5 SHA-1: 545927303fc20e15ca56d8f885a6eec4a03e076b SHA-256: 301ea1259180f83d1367a25204bb70d1a407faaff679ffda9ca938f62f5a9ed0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, suggesting it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a potential phishing or malware distribution scheme. No scripts were extracted, but the presence of many external links is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=mov+to+mp3+converter+online+free PDF link annotation
    • http://zulassung4you.de/bilder/file/25972551717.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/dibobige.pdfIn PDF document text
    • http://symbolfoods.com/files/file///82166815116.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/22569573981.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/muvamijojanezuso.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/xumokekaxajuk.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/68934017292.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/43721996315.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/wonepexagagegowologa.pdfIn PDF document text
    • http://rayanchem.com/d/files/67824346048.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/jilakubirepigajudomoti.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/4613695483.pdfIn PDF document text
    • http://carbonelite.ru/file/miwitevuzaxuvusisagup.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/rerobimomofebebi.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/japanudoweveparise.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/5159696397.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/luxafijinugufigude.pdfIn PDF document text
    • http://chenruichem.com/upload/files/35264542913.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/17846255697.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/zizeduvugipamoruwefuk.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/65975221823.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322dd3a451f---67701287215.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/tidofe.pdfIn PDF document text
    • http://minerva-collection.net/files/files/73784787876.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_off0000bead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAD 16268 bytes
SHA-256: 95d4cc1d3f11fcbfdaac775b89db270831c36bff28d46da8fe14a90b995b7ac9
font_01_sfnt_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 10544 bytes
SHA-256: 1d92708b07676efeee76b14b233438c4714c3f5e43e56f9def5d7bbb75c5a63b

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