Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f720149f0066415…

MALICIOUS

PDF

80.7 KB Created: 2021-04-05 10:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27fb18195ee928d9aaab721640edd587 SHA-1: 2989a13fa0d977e5a48847d558a34cb39414d4f9 SHA-256: 0f720149f0066415f2de51d0dc8301dbf187aee7793016c4864a02c68ae5b0f5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for users seeking pirated movie downloads. The PDF also exhibits characteristics of a link farm, suggesting an attempt to obscure the ultimate malicious destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=avengers+endgame+full+movie+free+download+tamilrockers
    • http://psylath.com/program_to_annotate_free7k5in.pdf
    • http://tezibif.mygamesonline.org/fender_mustang_gtx100_modelling_combo_amp.pdf
    • http://zumanidoxup.medianewsonline.com/biguzinifawalokiwex.pdf
    • https://cdn-cms.f-static.net/uploads/4471703/normal_606a65239dab5.pdf
    • http://ig-mediateam.net/fotunesokmedbw.pdf
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5fe39ea2b1f95.pdf
    • https://cdn-cms.f-static.net/uploads/4377931/normal_605235d806a7a.pdf
    • http://dawexefif.getenjoyment.net/beta_ossidazione_acidi_grassi.pdf
    • http://nageramuvepom.mywebcommunity.org/fujuvizep.pdf
    • http://1freedom.space/i_wish_t._o_ft_cher_lloyd_lyrics9rsqa.pdf
    • https://static.s123-cdn-static.com/uploads/4455916/normal_600603091da3e.pdf
    • http://lestyprin.online/bein_sports_turkiye_ligi_ozetlerif2brl.pdf
    • https://cdn-cms.f-static.net/uploads/4418370/normal_6013bf076a663.pdf
    • http://twirlini.com/tugasabozutudaxerozi4m1yt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29fe0fe7-e674-42ce-86b3-cd302641fdda/toviriloxuxelarenasi.pdf
    • http://wutesejib.onlinewebshop.net/38288581373.pdf
    • https://uploads.strikinglycdn.com/files/a77761a0-9f9b-4cdb-9e31-e115511c5b6e/the_carrot_seed_book_lessons.pdf
    • http://vujuvisesakok.myartsonline.com/60083161087.pdf
    • http://wugerubuvugox.myartsonline.com/shunt_reactor.pdf
    • https://s3.amazonaws.com/xuzed/pippi_longstocking_movie_characters.pdf
    • http://tuxefunuzire.atwebpages.com/work_experience_letter_sample.pdf
    • https://s3.amazonaws.com/sevoga/fun_activities_worksheets_for_preschoolers.pdf
    • https://uploads.strikinglycdn.com/files/b96bb52e-e815-43e6-91ad-d4fb28a76d3e/guvutav.pdf
    • https://s3.amazonaws.com/donarepemi/retiku.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f845.bin
7cf9bd184b276bff4943d792c0f18a31809aaddae2e5b3f8eea6d2f4a0f8f94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 5548 bytes
font_01_sfnt_off00010b29.bin
68efcc0bbc2cf2d0aac3786c3289aa6615644f149f9205f1d7215761c3361a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 11896 bytes

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