Malicious PDF — malware analysis report

Static analysis result for SHA-256 633edf14726dfce1…

MALICIOUS

PDF

70.1 KB Created: 2021-04-29 08:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22cbd9757e9d33ee3b5c7dc50acbff15 SHA-1: 9eb10a02f5c443f0e920055444d2ded0a26ed000 SHA-256: 633edf14726dfce1ed452e6d2762156e46614d9789a174589b5c2ddda74a349f
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 0.9993

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://jottigo.ru/strik?utm_term=research+methods+for+the+behavioral+sciences+5th+edition+pdf PDF link annotation
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/b07f687293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_605fb2835570e.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/67050342649.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/tegid.pdfIn PDF document text
    • https://bireguvax.weebly.com/uploads/1/3/0/7/130775683/vizujoweme.pdfIn PDF document text
    • https://xidifapub.weebly.com/uploads/1/3/0/8/130873728/6857353e11a0.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/wkhtmltopdf_page_break.pdfIn PDF document text
    • http://disupiwalu.mypressonline.com/kajafuro.pdfIn PDF document text
    • http://wixujikubipom.mygamesonline.org/abbyy_transformer_download_free_full_version.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/rikipore.pdfIn PDF document text
    • https://favonewe.weebly.com/uploads/1/3/2/6/132695639/zapudorev_wojarikibuwun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_601fbcb6f1bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_6039f1c011ee4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepetixapokurob.myartsonline.com/adkar_sabah_wal_masaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ab4267-17c2-4e86-8743-0ae802e19beb/xugofidobavawa.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/reaccion_de_combustion_del_pentano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccd3f0d-140a-4934-a63b-8aca0a571bf2/63715499098.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/96608217044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3013c74-5ba6-44ac-b544-80469f3f6d6f/silent_knight_sk-5208_reset_code.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/19648274967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5a7144-0b71-4691-891c-08aad395aa19/ff7_remake_summon_materia_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/gtx_970_vs_gtx_1060_notebook.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/37150484003.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_off0000d477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD477 5724 bytes
SHA-256: b9d6c8c10416dd1921250420532d4129380abd2e0aee347c81e94107bcd65e85
font_01_sfnt_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 10176 bytes
SHA-256: f0d8eff843595468ac110bea82fc02dda621b0018f3e1311ad1115848f3d2af6

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