Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1d396b797dc510…

MALICIOUS

PDF

74.3 KB Created: 2021-03-18 14:26:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0cac35e8b6952f277a260925bfbdc466 SHA-1: b2ff7369eb1a0480748f643c46d516529c884f27 SHA-256: af1d396b797dc5102fa5ea272c6553b2106d6668e389cb4c2ea4686fc0904c52
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=commutative+property+of+addition+and+multiplication+worksheet+pdf PDF link annotation
    • http://milanbeachs.space/lowrance_x_48_reviews1wet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501996/normal_5ffa00d091a6b.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/zolefut.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/kunisofaxupufozubi.pdfIn PDF document text
    • http://mamivadusijuf.iblogger.org/couple_dance_form_name.pdfIn PDF document text
    • https://cdn.sqhk.co/nabokufawogo/iatAfP1/personal_computer_assembly.pdfIn PDF document text
    • http://fortuneo.biz/59212301282i5st1.pdfIn PDF document text
    • http://zuwifipenabed.medianewsonline.com/active_and_passive_voice_examples_for_all_tenses.pdfIn PDF document text
    • http://artdebug.site/texas_land_lease_agreement_templatedt38c.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/kilaligebadugujat.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/3201345285.pdfIn PDF document text
    • http://phtech.site/derowekizixavalulobenin6mpng.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/physical_science_textbook_grade_10.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/panuwalafiderevudutodum.pdfIn PDF document text
    • http://kolagiriwu.22web.org/taiwan_subway_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5fdacb4ad255b.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/fgiPggB/begubuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_60504cde61324.pdfIn PDF document text
    • https://cdn.sqhk.co/nedivixozu/XBngjgj/pagegunemexofimalutavedu.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/lopafirozuvevawe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futikuzita.onlinewebshop.net/dell_optiplex_760_specs_motherboard.pdfIn PDF document text
    • http://komoridetunitiw.epizy.com/mejitanikivepejakof.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_off0000d897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD897 3304 bytes
SHA-256: 7db4aa9dcfc42b3a6ef9a04f555e0b2fea6a31cf0b1e3bf67d3f0cf3b72bc559
font_01_sfnt_off0000e47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 5616 bytes
SHA-256: e62a154779ad9eed89e6c735dae31b4a3c536ecb99a552d39b1ac32371451607
font_02_sfnt_off0000f787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF787 10340 bytes
SHA-256: 5240fca3f962df8378e097971be34d9bc577d3296fe150977e3c3150d8e683ce

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