Malicious PDF — malware analysis report

Static analysis result for SHA-256 2697b3555c96132d…

MALICIOUS

PDF

71.0 KB Created: 2021-02-22 04:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 03186ed4fc3ed0c19eb425aaf91c429c SHA-1: dacbdd6e7187471873648ae5806e362363697f60 SHA-256: 2697b3555c96132ddc903553df780291a8ea4436cf8e668eb38726b4f8fa38da
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=what+are+the+tools+used+in+quantitative+research PDF link annotation
    • http://reduslim-eu.site/87812851405kv7xh.pdfIn PDF document text
    • http://stepka2016.xyz/film_monkey_world_s_apes_revenges4p8c.pdfIn PDF document text
    • http://erogan-columbia.site/zigenexewazukirupurahv3v2.pdfIn PDF document text
    • http://kilagine.22web.org/audio_do_whatsapp.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/5th_grade_math_test_practice_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_60135c7ac14b6.pdfIn PDF document text
    • http://barurizex.iblogger.org/91137431966.pdfIn PDF document text
    • http://craftsmansmetics.com/realidades_capitulo_1_answersulr3r.pdfIn PDF document text
    • http://sesalon.xyz/how_to_get_command_block_in_autocadmf6ri.pdfIn PDF document text
    • http://sexedate69.site/wizard_world_of_harry_potter_orlandoki8jn.pdfIn PDF document text
    • http://avto-trokot.xyz/1-_99_crafting_guide_ironman_osrs1xev4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_60013d4b1a9cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_602649576b8e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467036/normal_5ff22cd8ee743.pdfIn PDF document text
    • http://sedovarubabozop.iblogger.org/garubomoginojokuxizebuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/39445308356.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/sierra_load_data_308_155_tmk.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/65687526688.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/tejolafujoloxo.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/chauvet_dj_intimidator_spot_110_manual.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_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 5224 bytes
SHA-256: d1e0df81de4d621ffdddb4dbe13cc813cdd12c78b3d912c0704fd1780a30d62c
font_01_sfnt_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 10472 bytes
SHA-256: a333d6a89e995cb24693c66586a48c8141a56061fd6f47dd2d0f8c68f26b402a