Malicious PDF — malware analysis report

Static analysis result for SHA-256 868a70b5f8bf12ca…

MALICIOUS

PDF

66.3 KB Created: 2021-04-08 09:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c4a6fb58e8a0f681e15e8f09d087c08c SHA-1: df8fe8a65bfafd8155acbbfd8054e7d64728ae82 SHA-256: 868a70b5f8bf12ca1a89b10c3d781e496b4149ee9d2443da3cf094b1383e9b13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://lozipotod.ru/123?utm_term=angular+material+design+icons+cheat+sheet PDF link annotation
    • http://melowew.scienceontheweb.net/mcdougal_littell_algebra_2_practice_workbook_answers.pdfIn PDF document text
    • http://stroiline74.ru/snow_slopes_australiaa0gkl.pdfIn PDF document text
    • http://lbaranaydin.com/book_autocad_blocks_free_download_dining_tablevbsjp.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/94032115838.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/jyidhe0/run_rush_3d_mod_apk_download.pdfIn PDF document text
    • https://tidatulo.weebly.com/uploads/1/3/2/8/132815220/d2d00b656d2.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/gajajegemared_wogifagixol_zosoduposi.pdfIn PDF document text
    • http://rasprodavaika.ru/diary_of_a_wimpy_kid_books_20198k1vy.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/hjgsuS8/wowitejudasejuroloda.pdfIn PDF document text
    • https://cdn.sqhk.co/givikufat/aYweXhj/tsi_reading_practice_test_1_answers.pdfIn PDF document text
    • http://moshon.space/eve_pi_p4_guideos5lj.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/appalachian_spring_suite_for_13_instruments.pdfIn PDF document text
    • http://hyipinvest.site/walmart_black_friday_hours_ct3uigy.pdfIn PDF document text
    • http://wigosixozem.mywebcommunity.org/the_story_of_job_in_the_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/jaB3Gic/black_panther_movie_soundtrack_zip.pdfIn PDF document text
    • http://zidujuwus.iblogger.org/437323046.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/bb28ac250.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juvumutat.rf.gd/area_of_triangle_parallelogram_trapezoid_worksheet.pdfIn PDF document text
    • http://jezeladi.rf.gd/97854828129.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/rusixajojizira.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/jafudul.pdfIn PDF document text
    • http://jofijegisa.atwebpages.com/9710386397.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_off0000c766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC766 5340 bytes
SHA-256: 71bb8db839537a428cacb9e27505c7089bfe677d3e6d98c5e4d10b73d082f9de
font_01_sfnt_off0000d965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 10048 bytes
SHA-256: a4dcf5ed5652b3f85bd2281a74f3ae78bad5743304f951d7778d422fbe1f2566

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