Malicious PDF — malware analysis report

Static analysis result for SHA-256 f471e8fed10da856…

MALICIOUS

PDF

77.8 KB Created: 2021-03-05 04:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f5f4c8c3142b6076624235b5af12c03 SHA-1: 342efb5a2de08e14f3e4f6ab2231dfdc4da8e9c1 SHA-256: f471e8fed10da856133fd6378688607d3577062d612e8bc0a7aa1a8ec96d8acb
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 0.9991

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://maypoin.ru/123?utm_term=what+is+derivational+and+inflectional+morphemes PDF link annotation
    • http://pifesato.iblogger.org/tepesovalolumanusapeliri.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/cI0Srgf/lijeziva.pdfIn PDF document text
    • http://liwojabegeje.iblogger.org/define_traditional_musical_instrument.pdfIn PDF document text
    • http://hookup154.online/mamakijinumurodajejaragiswrksp.pdfIn PDF document text
    • http://fuxokubatasiju.22web.org/ask_the_dust_john_fante_read_online.pdfIn PDF document text
    • http://twenty-promo2020.ru/84664994544ef8ve.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/i6aJ6ii/57549208203.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/gibjhTp/photo_editing_video_making_software_free_download.pdfIn PDF document text
    • http://x-bionic.shop/23599221006o7ubn.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/xCjjksw/22165486039.pdfIn PDF document text
    • http://hayatevesigar.online/9434259224r6s1c.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/5b8hfB3/lonerojujagedekorozusuku.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/jdgjKme/percentage_decrease_calculator_soup.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/jU8DgcJ/31587487550.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/gjhhicf/bubble_bobble_4_friends_switch_metacritic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pifutujotot.epizy.com/brentuning_vs_maperformance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c71ec2-4768-44e0-9dc9-b425418c5c61/binomial_probability_calculation_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d07f608-9869-4174-a978-af9d2e2f140c/tl-wpa4220_configurar_wifi.pdfIn PDF document text
    • http://ritanuwo.epizy.com/rurawodonezivuvaxofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e84412-f93e-4df0-9148-a77c60264992/22593505012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faba7a04-8a0b-4e7b-87d8-c5ea82889a24/kuriz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8494a0bf-50e1-41a7-ae02-f008480956f0/xaxiwaruvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a93810e-6506-4102-92b5-4d17618b1bf4/how_do_i_change_the_lightbulb_in_my_panasonic_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55862226-46ed-41e4-a142-3d625dcf65ef/new_big_nate_chapter_books.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_off0000f3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D3 5468 bytes
SHA-256: df99de6981a81163555a4cedf2ea8a74be1c5d18b75e9cd1e662d387853145ac
font_01_sfnt_off00010653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10653 10296 bytes
SHA-256: af1b2804a2d6a063dbd73eac2904676269c47781fb37c967d102e7e3262234e0

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