Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbd093988e3f130…

MALICIOUS

PDF

81.4 KB Created: 2021-04-02 00:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e2a5430bb13315334f4e9fe6fca61032 SHA-1: 80fc50d37aa77bd4c9c10c18a22e2aea5ec1ede1 SHA-256: acbd093988e3f130bd3cfc948240ff611bd0d2cb89762214d17f88f7f7974788
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 0.9995

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://gimoguvi.ru/123?utm_term=uriyadi+hd+movie++tamilgun PDF link annotation
    • http://construt.site/ffx_2_100_walkthrough_ps44eypb.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/hbz7SxQ/lofirolubup.pdfIn PDF document text
    • http://sebowiwuzoso.iblogger.org/zuvinededore.pdfIn PDF document text
    • http://randname.ru/frigidaire_washer_dryer_combo_troubleshootingucmtq.pdfIn PDF document text
    • http://nubolutlion.xyz/how_to_use_imovie_on_iphone_for_beginnersi37l8.pdfIn PDF document text
    • http://belldiscount.ru/what_is_service_oriented_architectureu3ece.pdfIn PDF document text
    • http://inostrana.com/cowboy_goodbye_songqaym2.pdfIn PDF document text
    • http://tizorudaredan.iblogger.org/lunazupejexoxef.pdfIn PDF document text
    • http://mubojumef.iblogger.org/precalculus_textbook_glencoe.pdfIn PDF document text
    • http://reduslim-europa.site/the_pyramid_principle_logic_in_writing_and_thinking_barbara_mintomg6nk.pdfIn PDF document text
    • http://fortuneo.biz/bapemobezokpniv8.pdfIn PDF document text
    • http://nunokitatamipo.22web.org/96509669958.pdfIn PDF document text
    • http://arm-watch3.club/did_taco_bell_discontinue_meximeltsxw11s.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/ihHUF5S/mokukode.pdfIn PDF document text
    • http://tivirazetuxozux.22web.org/tokyo_guidelines_pancreatitis.pdfIn PDF document text
    • http://girlita.space/best_free_stock_watchlist_appsxnp9p.pdfIn PDF document text
    • https://cdn.sqhk.co/kadukugobug/he7jjvl/one_piece_bounty_rush_android_apk.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/aea9de5b-2a1e-4d1e-95cb-3599b0cae9e6/ruxubasixepujidegot.pdfIn PDF document text
    • http://vularamefak.epizy.com/calculus_11th_edition_by_ron_larson.pdfIn PDF document text
    • http://kalijumixu.epizy.com/18496618357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc55f28-ce73-4858-8397-806d9faca3d3/basogoxug.pdfIn PDF document text
    • http://jufosuliz.epizy.com/tonidazuzatevarefij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 3812 bytes
SHA-256: 47061c6d2aac73ec6d6eb072bb8cd083aad84c44183208962ad0ed9e8307aef2
font_01_sfnt_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 5212 bytes
SHA-256: 87804280deedad83f5dfdf0a1ecceec19236ce273f2280a2da5444c561ff7963
font_02_sfnt_off000113e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E1 10444 bytes
SHA-256: d5192be859d5b4e2ed102bdb91e72c5a341415b4deae2d4d7bc23a04da203bda

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