Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9301ec351d9ed18…

MALICIOUS

PDF

94.5 KB Created: 2021-03-13 21:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3497496918401cc05209b8c2abeabf34 SHA-1: 94cc57b3a56a4ba751f538b96c2a5a9e88920fd2 SHA-256: b9301ec351d9ed18f4f590bdabd863950618580e3f1a3c07592f055154a15a00
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 0.9994

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://kuzutuzo.ru/award?keyword=field+guide+to+geometrical+optics+pdf+download PDF link annotation
    • https://cdn.sqhk.co/nowovadizeb/g2Gggha/dreamed_about_my_ex.pdfIn PDF document text
    • http://zadakob.22web.org/pikaruvovifiz.pdfIn PDF document text
    • http://onlinesos.tech/vefidokudewet4bj8m.pdfIn PDF document text
    • http://yazansoft.com/dunkin_donuts_matcha_latte_with_oat_milk_caloriesyd9n0.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/foster_child_life_book_templates.pdfIn PDF document text
    • http://aydym.club/whole_brain_power_bookgism0.pdfIn PDF document text
    • http://zivufomureko.22web.org/harmony_700_remote_battery_replacement.pdfIn PDF document text
    • http://kelnoteres.xyz/chennai_map_hdbc9pb.pdfIn PDF document text
    • http://libertinemodels.com/mathematics_for_computer_science_lehman_leighton_meyer1ff15.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/jZicidr/38107512081.pdfIn PDF document text
    • http://topstop.site/is_sidereal_and_vedic_astrology_the_samea4qk1.pdfIn PDF document text
    • https://cdn.sqhk.co/velijituma/jaijijx/syrinscape_tabletop_rpg_soundtrack.pdfIn PDF document text
    • http://vejawezodasupax.22web.org/le_comparatif_et_le_superlatif_en_franais_exercices.pdfIn PDF document text
    • https://cdn.sqhk.co/pabukerofo/j3hbBgc/carrier_hub_processing_request.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/84433807002.pdfIn PDF document text
    • https://cdn.sqhk.co/sokavuwoz/ggfqgeh/57682080213.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/23036961122.pdfIn PDF document text
    • http://it50off.pro/what_is_the_fee_for_usmle_step_1pw1gh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadirojata.rf.gd/85896966385.pdfIn PDF document text
    • http://temekerujaniva.rf.gd/xepupamu.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/dremel_tool_4000_vs_4300.pdfIn PDF document text
    • http://venakato.epizy.com/julofojafusofeneviji.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 5520 bytes
SHA-256: 7dea6ad9d75ceef2f68506d45056212e0b4f0e9dbb555f40efd7fcf5e26c3225
font_01_sfnt_off00013276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13276 2256 bytes
SHA-256: cc76bf3a326b24c924c72a9ca3edd78458e9df0a249d25ea14f54f08ccb2e537
font_02_sfnt_off00013bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFD 14212 bytes
SHA-256: 55e6686905fafa619f0f0ccb4b5aab4aac62afedc6a7ed13025ef918111c0f19

Open this report in the interactive analyzer, or submit your own file for analysis.