Malicious PDF — malware analysis report

Static analysis result for SHA-256 209f364948632b1f…

MALICIOUS

PDF

78.8 KB Created: 2021-03-17 18:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fb489ea089893f1e10525bf06c829f4b SHA-1: 599fe98ea1aafe9c0e91ba63929b7f93fa8f23b3 SHA-256: 209f364948632b1f0d34a345128d0eb38eb7b4a39e8e11087d63e4f99f0d21ec
186 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 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=the+giver+questions+and+answers+chapters+16-23 PDF link annotation
    • https://cdn.sqhk.co/telazaje/gchiggm/zig_zag_cones_price.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/75036571056.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/garmin_541s_flush_mount_kit.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/lopujamawavor_polegu_jafejobat_baritekapi.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/7adfc8566.pdfIn PDF document text
    • https://nubapatis.weebly.com/uploads/1/3/4/0/134095887/0556f633.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/ximepesikejuru.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/crock_pot_dump_dinner_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/wudenedu/YKQrjbK/jawosipejifebikifosimi.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/kingdom_manga_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/bqMhhid/black_forest_cake_1kg_price_in_nagercoil.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/flashing_led_using_555_timer.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/PEn5haT/sort_it_3d_level_11.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/nibib-lananul-jesuwexe-bevav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a50256-8c51-4eca-a4bf-50f84348cdc1/16897136086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ef79c8-f7e4-4229-a6f4-7c4143cdb1db/ver_percy_jackson_3_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac727cd0-4af1-4306-9339-9d89febe07d8/gigivadoviburivujidore.pdfIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_fbd2311235464f3488f60a3782aa43fa.pdf?index=trueIn PDF document text
    • http://kesolimasakifi.myartsonline.com/pathology_atlas_robbins.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_ecb35d8362914690bf7598440ca27f04.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_eeb1036a02cd4af390c85a32aba55798.pdf?index=trueIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_200ab3aa5bdf4077adf35508e69d2b28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eeb556d-d058-4a30-9d3a-ff98eef43dac/nanatokulajoxemijoviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c04e19a-338f-45ae-9693-7bd98a3df608/what_was_president_lincolns_plan_for_reconstruction_called.pdfIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_8d62bf2bd3be451aab2450d84dd3178d.pdf?index=trueIn 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_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 6064 bytes
SHA-256: 66dc1128885279e88f37c900bfd5e9482557188ca3d3fed369309c463c702639
font_01_sfnt_off000108d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D2 10828 bytes
SHA-256: 7a4dcf4f28e28a65852fc87d69a95019cb2f17a1f3644b9dc38268f957f5624b