Malicious PDF — malware analysis report

Static analysis result for SHA-256 031322079d8889da…

MALICIOUS

PDF

70.9 KB Created: 2021-03-24 23:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c1e135c704d5ef46c94b0f771223b69 SHA-1: 9420f3ce32db5096b04ed4cbb277c9fbcec8872f SHA-256: 031322079d8889daf4f8f81ad55368f94e0f53303c62135f2ae6b73c89038e97
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 0.9996

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://bologen.ru/strik?utm_term=us+history+regents+exam+2019 PDF link annotation
    • http://dunizajo.66ghz.com/xezidikevekexudopad.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/ijhigho/office_quest_chapter_2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/TAjbjjv/11771730259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451205/normal_5ffc14832c2ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_60188911b38e9.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/ekkjbgd/ea_sports_ufc_2_download_android.pdfIn PDF document text
    • https://cdn.sqhk.co/naxudufejik/fiD8Eha/board_games_shop_melbourne.pdfIn PDF document text
    • https://cdn.sqhk.co/nujusowidom/Eidhdjj/87192832821.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/plhifhh/fizemasoki.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/ehf4pqx/90401275242.pdfIn PDF document text
    • https://cdn.sqhk.co/dowepigakaw/iX7icU5/selukomaritixefadiw.pdfIn PDF document text
    • http://ziwefewixus.iblogger.org/captivated_nora_roberts_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5fd947fad78b1.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/hcx3rgi/new_english_songs_2019_mp4_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_601e90dbe04e8.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/bf93a187-8075-44dd-9ad6-6b29e2767ce4/brown_bear_brown_bear_what_do_you_see_meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebc17bd-6666-4a1a-a70c-2f3859c2a8b8/xalajutes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2be2ca-4b8c-46ec-a2b5-9e982b6dd67c/dell_inspiron_n5010_power_jack_board_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611e120c-676f-41f6-95c2-b1f3a0817b40/taxajopuzufu.pdfIn PDF document text
    • http://pazawidef.rf.gd/23849223365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2663b7c-9dcd-44db-b647-4d51f6569ba3/how_to_reset_your_sentry_safe_code.pdfIn PDF document text
    • http://tutalisog.rf.gd/movie_the_autopsy_of_jane_doe.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_off0000d660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD660 5712 bytes
SHA-256: 9f33f5ebeae15415a2f2a7cc631bfd4346939f131fbdf13f29cb153cb655081d
font_01_sfnt_off0000e9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 10936 bytes
SHA-256: 2d817a9be1da227b7576a7696f5079faaf2ce4caba34018ddb429fb9c8da9618

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