Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5218af8ff0e01e…

MALICIOUS

PDF

80.2 KB Created: 2021-04-06 06:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c4bf0d82a91792d9eebf22fe5b3606b SHA-1: 52782ca57d17ddb7f2fc329284b48fbbe281b729 SHA-256: 0c5218af8ff0e01ebcacae49921392bbca45e9d1b2833cb438778adb63428929
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The embedded content, though heavily obfuscated, indicates the file's purpose is to redirect users to potentially harmful external sites.

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/123?utm_term=majin+android+21+x+male+reader+lemon PDF link annotation
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/pafobonimuteros.pdfIn PDF document text
    • http://birodavaz.22web.org/folder_tree_diagram_template.pdfIn PDF document text
    • https://mifopezuzata.weebly.com/uploads/1/3/4/4/134484464/gizena.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/kofotolinizepi-xezol.pdfIn PDF document text
    • http://fomuvegikutidob.iblogger.org/86385414450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_2d240108683b432393bed2ee5986cdb6.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_95aeba9413e54a9382cd4955a9d1f324.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/arc_mate_100i_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780bb27d-e9c3-4225-b02b-f38473a910b5/venofusisulezunowosodimag.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_98b5d336c1de4213bd4d499177449c57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bodajaku/premium_joomla_templates_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/form_an_alliance_synonym.pdfIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_12fac9956d054fa980f6cbbaeb360509.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7b3de0-d92c-44fc-89aa-e07f417dda9b/short_answer_study_guide_questions_lord_of_the_flies_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3664ff8d-ecb3-41e4-acac-2ae6916d9a10/99881563953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6ea692-eb05-4100-923d-86e2415b1295/fagufopizibizi.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/monitor_cardiaco_speedo_80565g0epnp1_manual.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_c649684343764f33850d13fa197c4a09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/mibofow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167a4d4f-d3bd-408c-959d-ff4e4f28090c/pelinivakafivupewixezex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00a83bc-d592-4081-9989-fe4b31ce20cf/probability_and_statistics_degroot_4th_edition_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86599678-5eab-44cf-a6f7-7366638bef44/17_day_diet_cycle_1_dinner_ideas.pdfIn PDF document text
    • http://litopuputorer.rf.gd/enciclopedia_de_botanica_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e89aa3-44c8-4287-984b-10f189d07ea0/different_types_of_manufacturing_process_in_operations_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce60e32-9938-4e6c-b137-257bcb21cccd/which_is_better_the_magic_bullet_nutribullet_pro_or_ninja.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_off0000f8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 5124 bytes
SHA-256: c43ec62d95584e5a17d83ab5bb97f8ef3cbc14e2bb15019930a03a5eef510967
font_01_sfnt_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 12972 bytes
SHA-256: a1101b38944bac0e0c626f317649fc526b063e7e3d10e3d8d893d64fe0033b17