Malicious PDF — malware analysis report

Static analysis result for SHA-256 78024df2c65c808f…

MALICIOUS

PDF

86.2 KB Created: 2021-02-11 16:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ab80baa4232a372dd0661b713b28c2a5 SHA-1: 84afc5f1627e8007b7fe1f2bb5f377b60dea7634 SHA-256: 78024df2c65c808f1b5d8c6892cb61ecfad3e8d82fbc561824ae10f5e3c78bad
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host multiple links, likely for phishing or malware distribution. The embedded URLs, such as 'https://jottigo.ru/123?utm_term=air+supply+albums+mp3+download', suggest a lure to download content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=air+supply+albums+mp3+download PDF link annotation
    • https://cdn.sqhk.co/metevetufi/hjge5jg/28556083854.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/hjfH5jc/63992579469.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/jbvicxa/fakomiv.pdfIn PDF document text
    • http://dolekil.22web.org/bladder_training_with_foley.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/himkJgg/ledenudes.pdfIn PDF document text
    • http://dokanusivodob.22web.org/85026556441.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/e1iinji/sisters_of_battle_kill_team_elites.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/wijjlij/alone_season_7_episodes_wiki.pdfIn PDF document text
    • https://\\\/a10.gaanacdn.com\/images\/artists\/36\/19436\/crop_80x80_19436.jpg,objtype:4In PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusagi/sulutaneri.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/free_foxit_reader_for_windows_10.pdfIn PDF document text
    • http://vanudedu.epizy.com/additional_information_form_for_drug_licence.pdfIn PDF document text
    • http://lepomosafajuki.rf.gd/miwidizujipobewuge.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/33110410232.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/getakepiludonika.pdfIn PDF document text
    • http://kegipufi.rf.gd/voragunarutubogulajum.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/anime_cyclops_shoujo_saipu_sub_indo.pdfIn PDF document text
    • http://zilokujidetomo.epizy.com/spider_man_comics_ebook_free.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/xukefikakupokizasiz.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000e419.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE419 11240 bytes
SHA-256: 66a6a8453753a2c532efcb71e06a6f5db018bc66e39aa960e780513bcc990ee0
font_00_sfnt_off0000d127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 5592 bytes
SHA-256: 5c331244abf4c4ad9281201af20a02dbeae0c687feeeda770d04a195a5e2d1f6
font_02_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 16212 bytes
SHA-256: 304b9e3804493923137cd9e726c2794aca6821db031ea22e4755b0a29896c8d3
font_03_sfnt_off00013406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13406 16224 bytes
SHA-256: 6ed9c900af3bc8b77b754d4973ef654871147e76711324a1a7c51614a1f46251

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