Malicious PDF — malware analysis report

Static analysis result for SHA-256 3916241578344a96…

MALICIOUS

PDF

67.5 KB Created: 2021-03-14 02:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 80deb84df0af28dc521a258c6de38d2c SHA-1: 338bf779016bf14431a135beb6a3890438c8c534 SHA-256: 3916241578344a96427d44a2256bbc7aa99e6e4ee26ff7f3d96b465a15fb91a9
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 0.9998

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://xezojetit.ru/strik?utm_term=panasonic+genius+prestige+microwave PDF link annotation
    • http://wosutopanoba.mygamesonline.org/meaning_of_sustainable_development.pdfIn PDF document text
    • http://xokezuwadem.mygamesonline.org/blue_collar_brilliance_mike_rose.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/46300527468.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/how_many_books_are_there_in_total_in_the_catholic_bible.pdfIn PDF document text
    • http://firstreadersclub.com/355609300228gj6l.pdfIn PDF document text
    • http://cashbackmoney.info/pdf_to_dwg_online_no_emailqqgli.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/viper_car_alarm_key_fob_not_working.pdfIn PDF document text
    • http://torixewiser.medianewsonline.com/decimal_to_bcd_encoder.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/3ce4ffbf-71f3-4f40-a0ae-9b69d7cb1cc9/1396017364.pdfIn PDF document text
    • http://zemonipovop.epizy.com/astitva_band_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fc8363-80b9-4cc1-866a-31d26df8f452/how_do_i_become_a_cloud_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfa24d9-6e70-43c8-b9eb-9b72c32b0b6d/thor_son_of_odin_marvel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8b6645-acfe-4627-89cd-df7474256220/star_trek_beyond_music_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cdc92b-9b59-48c3-b323-dddd280099d1/eddie_bauer_infant_car_seat_installation.pdfIn PDF document text
    • http://turibowuwo.epizy.com/slimming_world_free_foods_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a900c8-af67-4a12-ac6b-b322b6f9b891/55714521098.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/database_security_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40619275-d9bd-4a12-8c7f-c80ee338dbd1/line_6_spider_jam_2.0_review.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_off0000cac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC4 5372 bytes
SHA-256: 61535b286588a9d202211ae197876e10f7c98091246c39c46e0268b5e0a10242
font_01_sfnt_off0000dd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0F 10356 bytes
SHA-256: 14c46857d9e56e9c99607d9f5fe82a681d010decba36155d37a3afdffa4c630e

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