Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c57be434f431a4…

MALICIOUS

PDF

73.1 KB Created: 2021-03-21 10:34:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1b1091716d871ef88298344cdbb4c5b2 SHA-1: 85dd60e761b1acd89e4dc8e9de292b6d55ab771e SHA-256: d8c57be434f431a494247bd65e4bd6b580356ac507714a76d60aa0d42b2efdbb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://fokemale.ru/123?utm_term=telugu+ringtones+love+music PDF link annotation
    • http://tinesemexogo.mygamesonline.org/lg_direct_drive_washing_machine_not_working.pdfIn PDF document text
    • http://raisinshub.pro/sda_church_close_to_me42snf.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/abdomen_anatomy_atlas.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/Ib7iacx/a_history_of_africa_book_written_by.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/geWdhbL/pulling_us_mod_apk_revdl.pdfIn PDF document text
    • http://glossywp.online/how_to_do_english_speaking_practice_aloneerpi4.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/bsp_thread_chart_in_mm.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/analisis_del_libro_la_tregua_de_mario_benedetti.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/street_level_airway_management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_8b2f8be9040b45e1b60cc4b71713c6bf.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_d76a4f1784ad4cd2ac7bc1d4ad9803f6.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_51dc6ae61f49454d9e0929d9c3ab7fff.pdf?index=trueIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_c27cef9457ca4d969fc8cd2b0d212438.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49803fde-6370-4d6e-bcb3-601cac0ed317/what_reading_level_is_junie_b_jones_dumb_bunny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c30ec45-6deb-4ec8-aa3e-7bb7908a447a/94814702020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f7b7bf-945d-4507-ba5c-3836460e749e/desemididukes.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_d7e8c764de3f4df29d873d259633f33c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/107d1cbf-4ed9-4468-941f-cf61ef46ed99/gugavemikamuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1ed74e-55d9-4d14-aa17-a90b07ec7a76/jikodazatul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf4e886-6313-4f8f-86ef-2e2f28050238/rigalebesojetozumazox.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 4916 bytes
SHA-256: 976d1b1a7301133129548168c13ba2984f904daaf1a62345000f85558b0de989
font_01_sfnt_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 10476 bytes
SHA-256: 04bf8c7d785765c4ebd8aed02a6ef8268f3df9f6e244ec839dbd21e2f6dabcba

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