Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe62ce145c3a23a…

MALICIOUS

PDF

73.0 KB Created: 2021-03-24 21:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c60e7101573ea5f0a5643018c5e688dd SHA-1: f6dfdce71d34ba251f4bd06756bca0a594fc40b2 SHA-256: abe62ce145c3a23a11d0b92faf6ea351d8910385c514e2d79bcbc81e77e3f144
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'jacksth.ru', which is likely a malicious domain used to host a secondary payload or phishing page. The PDF structure also exhibits characteristics of a link farm on disposable hosting, further suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=act+of+toleration+1649+apush PDF link annotation
    • https://cdn.sqhk.co/pofadugilip/hhfIgeL/filavajotuxutixuloro.pdfIn PDF document text
    • http://all-system7.club/how_to_use_different_pool_filter_valve_settings1ubet.pdfIn PDF document text
    • http://gromstroy.com/rimabijuq1kpd.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/665845.pdfIn PDF document text
    • http://reduslim-siteofficial.site/kosuguvimalorinosepanom8lk87.pdfIn PDF document text
    • https://xomadugazulu.weebly.com/uploads/1/3/4/5/134597447/3216359.pdfIn PDF document text
    • https://cdn.sqhk.co/wiradimabid/FnhdhcU/lapanofomebit.pdfIn PDF document text
    • http://blockingscenery.com/watch_dogs_2_ps4_save_data51rhr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_dc38a962df164caba4cb04d27b3cd164.pdf?index=trueIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_c4458d8a1da643fdb3442f4cf5e1ee44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ee08c2-c816-4596-a1e1-3bb8f17d6d93/motivation_and_learning_strategies_for_college_success_5th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/limegadapukuvov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6183600-c909-42c5-b4fe-1613e5d7b2d5/rogue_lawyer_review_new_york_times.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/bahut_pyar_karte_hai_video_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/microsoft_word_calendar_template_2019.pdfIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_7319ef6641204a049afc87991973eb38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa656e17-0eb7-4b62-b742-d427798e9083/xuzonuvivojukijokasoduluz.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_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 5544 bytes
SHA-256: f91c54c999c50839285cabe397e171ddd3677b61cc2c3081fbf6b376548e120d
font_01_sfnt_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 9756 bytes
SHA-256: 458887f9dfd23dc09d6d7b1d53f38a3a0a0f57082f2b3303adda73047ac60fbe

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