Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8eab6f1e58c1f9…

MALICIOUS

PDF

72.3 KB Created: 2021-03-12 03:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4ce9c7798e7e3d3015794d063a3498b4 SHA-1: 8367b337d76bb5751e557c929cbb20e0466ed379 SHA-256: 7e8eab6f1e58c1f902a895714d4450e0f8c6493c1bf511e714ff6f4699d85241
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=certificate+format+for+project+report+class+12 PDF link annotation
    • http://fadewujetenuve.mywebcommunity.org/stihl_cordless_string_trimmer_reviews.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/8578556350.pdfIn PDF document text
    • https://mutikotamibe.weebly.com/uploads/1/3/0/8/130874320/porudepez.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/integral_of_csc2x.pdfIn PDF document text
    • https://gadogirunen.weebly.com/uploads/1/3/5/3/135347667/wovowofojanikebukovo.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/wedaxebamisixapifola.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/fematoraz.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/82500051316.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/hard_soft_acid_base_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_0b254ab038b443f1bbf8ed4fdee5860e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57a38a4-e9bf-42cb-8866-44a604293aa6/gezebivezipugufojawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea080003-db07-4a1a-8555-3c88b9ca392c/77483922550.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/69374610518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ac216b-d2f7-4a2b-acb8-157a22de901c/gobez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edca4701-6873-4006-8d15-30e485e17c01/16438393653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3162916-fefd-4657-8847-02fc7571ce69/pioneer_sx-780_stereo_review.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_0a33a56edbfd427eab6b1f7d8cdc3f10.pdf?index=trueIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/jaybird_x3_vs_x4_vs_tarah.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_596a672f9f624dd29ef268e1ab99fa8e.pdf?index=trueIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_65668ef089c3413c9c64581d5a660b7f.pdf?index=trueIn PDF document text
    • http://rususekobijo.myartsonline.com/delonghi_pinguino_4_in_1_portable_air_conditioner_14000_btu.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_off0000dd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 5328 bytes
SHA-256: 47b88be66b5bf30b2bd7f3b56a6a47788efbfa9dc15f3df9caf0913560a22fed
font_01_sfnt_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 10648 bytes
SHA-256: d4e1ccfe6d8b52d0d17f21b39f6d44c6daff3c17b6795add6587685599a6adfb

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