Malicious PDF — malware analysis report

Static analysis result for SHA-256 e194ecc8cf1a8675…

MALICIOUS

PDF

70.3 KB Created: 2021-03-28 01:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ec915662eccd9f66618e23480019d58 SHA-1: ab1fe18ab1667ba7ca88c6a1ae44106d4ab95632 SHA-256: e194ecc8cf1a867567e777fa9a2e6458acfa630f861a935f0fbee7864edd6435
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://fokemale.ru/wix?keyword=american+government+chapter+19+section+1+assessment+answers PDF link annotation
    • http://se-mrush.com/laporolesonulapupubifup0237e.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/SaPhiji/51308096645.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/ihggidb/eve_echoes_market_data.pdfIn PDF document text
    • http://game-pro.xyz/pigitalamuganurigowekuvgnkth.pdfIn PDF document text
    • http://todayit.pro/fadofibojemepiwubibonovr1iv6.pdfIn PDF document text
    • http://pressit.space/wuxejuki55sed.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/51548ae3-8dac-4512-b539-d6bb1e02702c/gigijipibomezaditiliz.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/83949317101.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/61197015794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e355e3a3-799b-4aab-8c93-8921d18a15dc/yo_amo_san_pedro_de_la_cueva_videos.pdfIn PDF document text
    • http://pubanewu.rf.gd/mimij.pdfIn PDF document text
    • http://kagazomanuwez.epizy.com/how_to_rearrange_pages_in_adobe_acrobat_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b223a0-09c2-4150-99bc-299e7d0e5758/windows_10_ng_command_not_found.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2483a921-2fff-4b24-8fcc-0182db13c16f/24858755244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac449394-de07-4727-b69d-a245ba392421/what_is_the_coldest_inhabited_place_on_earth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763cc454-152b-4ee5-9cd4-09ff997e6970/88882811957.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/xozokujibabawuzaladuraj.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/c_primer_5th_edition_errata.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/meters_centimeters_millimeters_worksheets.pdfIn PDF document text
    • http://jegefikaxat.epizy.com/brain_gym_book.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_off0000d6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 5664 bytes
SHA-256: 8f6b52101e008ba677b2e0704a831313525b20b53704161c78ec6d866479a9ba
font_01_sfnt_off0000ea2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2F 9672 bytes
SHA-256: a7034a7d9c175ef8ab9cd40e076ab93834e7d1b8b0db468a4c33d8b8cbaa1e45

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