Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ef2f6866fa89ad…

MALICIOUS

PDF

80.1 KB Created: 2021-03-17 00:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 786c4edad459a8f77397f4f0495a0f48 SHA-1: 6f611b816f7e6548269b1f53a5fe5f91d51becb8 SHA-256: 19ef2f6866fa89ad42af22f560b1ccf3c88186c09e4191c6eddec3ee384c9cd1
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. It contains an embedded URI pointing to 'leonvi.ru', which is likely part of the phishing infrastructure. The document body, though heavily obfuscated, suggests a lure related to an owner's manual, a common tactic for phishing campaigns.

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://leonvi.ru/wix?keyword=2011+honda+civic+ex+owners+manual PDF link annotation
    • https://cdn.sqhk.co/xenivoronizu/afijjbD/77080826118.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/yyghWjb/xamik.pdfIn PDF document text
    • https://cdn.sqhk.co/zipedufipiz/jedhf5v/truck_hill_climbing_game_download.pdfIn PDF document text
    • http://mkr-olimp.info/3870871639m0h7o.pdfIn PDF document text
    • http://trenolgia.buzz/iphone_12_mini_review_gsmarenaungqb.pdfIn PDF document text
    • http://rankingcoach-seo.com/bufipotunipipa47mnp.pdfIn PDF document text
    • https://cdn.sqhk.co/rojawamusula/e5Xcrjd/ravimapikomotuluj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f010f6-e4ef-4a90-ae8a-023361af0d7a/why_wont_my_toro_zero_turn_lawn_mower_start.pdfIn PDF document text
    • http://tifijawubizomed.epizy.com/avision_button_manager_v1.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_5aa24572cc2843b3a86e4de26feec03a.pdf?index=trueIn PDF document text
    • http://likirese.epizy.com/zixotuvosowav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f5cde0-8344-4f97-a258-003194c389dd/how_much_does_the_cast_of_the_magicians_make.pdfIn PDF document text
    • http://winulesodix.rf.gd/29731592158.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_fd5521b282a64457a917df90b509013d.pdf?index=trueIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_c765bc6114de40f5a3207bd21b571ad2.pdf?index=trueIn PDF document text
    • http://kalidoro.epizy.com/kubinosa.pdfIn PDF document text
    • http://jowesokawebape.epizy.com/43645597456.pdfIn PDF document text
    • http://tuxolemoga.epizy.com/76645936669.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_0dadd39c37ea4c54a75fde362b03eb2f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c92c80-f0da-46d6-9dd8-31297d73d5b0/can_kindle_paperwhite_use_overdrive.pdfIn PDF document text
    • http://farevuzafi.rf.gd/pilagibekifenosozif.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/88261768998.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 5628 bytes
SHA-256: 27cf69a88b06af1a844365661e3b339710ffda7c7612ab44017ced8872dfbe0d
font_01_sfnt_off00010f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F50 10352 bytes
SHA-256: 6622739c86f0cf34deb091a6ab63190d8f3389c0c4551ade9d7b77e136f1ea2e

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