Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47b21ccebd816a5…

MALICIOUS

PDF

83.7 KB Created: 2021-03-04 18:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b5c4d49d16bc0e59d22cb9e345b5a9d7 SHA-1: c7808363292a1d3cc25b0987730f11280a9a7de3 SHA-256: e47b21ccebd816a55f8b18599e24b72d7e9913d69035a3099251b5b92074b58a
96 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 a suspicious domain, 'jottigo.ru', which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for creating malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=how+to+describe+a+sunny+morning PDF link annotation
    • http://sushibara.net/phet_density_worksheet_answersplm9f.pdfIn PDF document text
    • https://cdn.sqhk.co/monubinejon/lkjggfx/9124798874.pdfIn PDF document text
    • http://yoganchik.space/awesomenauts_assemble_trophy_guidejhyio.pdfIn PDF document text
    • http://crispyset.online/sun_racer_bicycleccj4t.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/Jc9Yidm/kodiak_island_borough_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/XXjjij0/webugat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a20e3a34-2b3b-4b86-a3f5-73ce54bb4646/tp-link_tl-wa850re_n300_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9f6df5-e3b3-4a2e-8ca8-7d95694b99b0/nanotatutuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260fab2f-e187-46a8-8d97-7e973a18cef4/49383921420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1960a6e3-69cd-4226-a618-f1d8779bd488/57860586646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a406cb7-9228-4ba3-83a4-011a0a42d199/john_deere_x304_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91073fba-2971-4114-8e6f-5122b3622872/especializacion_derecho_procesal_civil_uba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7c933f-684e-4b57-978f-e34779cca13a/fimibazoxijazajagosepod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c75094-c0f7-4b60-a1c9-bf3aff24685c/what_beans_can_you_eat_on_a_low_fodmap_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42749015-2c52-47c9-a9fd-b628abeda85e/un_sustainable_development_goals_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dabc1e7-b972-42e9-a051-cb1ee6d751da/surfboard_sb6121_ip_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc705edd-83d2-4450-9bc9-1a1478085260/jarup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5333d9-d1ff-475e-81b3-057794ff7998/how_to_draw_easy_stitch_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58dcce9-89ef-4e6b-b88f-ffdfc9ed973e/how_long_can_someone_collect_social_security_disability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8964038-2dd6-46dc-a84a-f1bb44442050/53871174821.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 5404 bytes
SHA-256: 4e7c442331b3385bf4b0b1e4f5df6b574c79136feb55102b1ece44ab347f14bb
font_01_sfnt_off00011046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11046 10408 bytes
SHA-256: 0b4aa8929255f14b57fc2855b8a718d3791adc729aaad0c3bbf24449b0d7c2c1
font_02_sfnt_off000133ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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