Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84d405fce6f001e…

MALICIOUS

PDF

81.2 KB Created: 2021-05-12 20:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d5da72e4ea4da120b881c6643e374a6 SHA-1: dd2da3df24b2ab2b6c8fb7653f4c14841b6d9602 SHA-256: f84d405fce6f001e6f8aa7e8ec0cdff2c5f5556f6ea37ac79a531de7e312f13e
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://maypoin.ru/strik?utm_term=why+refrigerator+not+defrosting PDF link annotation
    • http://fafabil.getenjoyment.net/10321570618.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/etifjeK/marshmello_happier_feat._bastille_lyrics.pdfIn PDF document text
    • http://milukiwidawedej.22web.org/61715427276.pdfIn PDF document text
    • http://palitra-cveta.ru/comcast_dvr_box_stuck_on_boot1thhf.pdfIn PDF document text
    • http://about-fb-support.com/rc_hibbeler_fluid_mechanics_solutionoy4cj.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/bagh_bhatt_ayurveda_books_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/qifjbjj/6980427522.pdfIn PDF document text
    • http://therarbooks.com/50142922434m9tti.pdfIn PDF document text
    • http://tonivatibiri.22web.org/rogokarejutakumejed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408997/normal_5fedf0d4439ab.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/jhhhshe/silver_dollar_city_christmas_lights_video.pdfIn PDF document text
    • http://socialwave.me/506721520541709n.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jci6ibG/freeciv_for_mac.pdfIn PDF document text
    • http://whalesqpa.fun/calculations_using_significant_figures_worksheety1wo0.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/cRkhe49/66879504907.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/what_is_sisterhood_to_you.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_603d5721da282.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/arthropods_test_worksheet.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/what_books_were_removed_from_the_bible_in_1684.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/please_find_attached_the_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/25147001798.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/dont_quit_poem_author.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_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 5040 bytes
SHA-256: f95a6278f90b0ab7b9d7deb443b7733e25d50fc66dfa1cb744781b95b9e60178
font_01_sfnt_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 10692 bytes
SHA-256: 3a01383deb7b249023539c80fcba6f2b88c4fa0f650e0105b6de80e88e392d43
font_02_sfnt_off00012768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12768 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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