Malicious PDF — malware analysis report

Static analysis result for SHA-256 287efd07562c16f8…

MALICIOUS

PDF

97.1 KB Created: 2021-03-10 12:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb0ae2d36cec14eca00e4af196d4eba1 SHA-1: 9a7df91ef8967b22c42b0cf007dd5e9ca5b4c683 SHA-256: 287efd07562c16f8aac2f3c04ef9d34a8f84ed564afa0129652821340d255c47
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-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://nipisod.ru/strik?utm_term=did+theseus+kill+the+minotaur PDF link annotation
    • http://tezijexipilimo.getenjoyment.net/boat_bill_of_sale_template_free_canada.pdfIn PDF document text
    • http://livecopyrightverification.com/60860245465v5dls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_6009116db57a6.pdfIn PDF document text
    • http://haifaiv.ru/mogumoniradixono7bo12.pdfIn PDF document text
    • http://form-copyrightservices.com/how_do_you_do_capital_budgeting_techniquestgwwt.pdfIn PDF document text
    • http://lenulari.mypressonline.com/26642661610.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/kiramanif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_60469a4b7f6f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426257/normal_603c88c62515d.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/the_standard_401k_withdrawal.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/black_and_decker_grass_hog_trimmer_head.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_6011bd95368c0.pdfIn PDF document text
    • http://ogranicbio.fun/my_morning_jacket_at_dawn_rarvi9fa.pdfIn PDF document text
    • http://maewallace.com/rufoxelb2mlz.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/is_there_going_to_be_a_4th_divergent_film.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/dr_seuss_beginner_books_amazon.pdfIn PDF document text
    • http://raftgjgr.space/kenshi_custom_startxbwak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_0069b54293f847d5826fc368a15717d4.pdf?index=trueIn PDF document text
    • http://fararisujis.myartsonline.com/29807868545.pdfIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_5c1ed2a4fb504e00bf9be484e37642f6.pdf?index=trueIn PDF document text
    • http://tosurok.myartsonline.com/what_is_a_palo_santo_smudge_stick.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_f18e273f17f346e184354498e84e6f56.pdf?index=trueIn 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_off0001335c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335C 5128 bytes
SHA-256: 0f7f00123c614625e05eca2940e3d6f1d7f7ecfdd3cb479015e084ab203923dd
font_01_sfnt_off0001449f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1449F 16828 bytes
SHA-256: 1ee95fee50f632ad0fc6e7621be3c964591c1692c345b7d97f10b729fec4107a

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