Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6622a73320e2a5…

MALICIOUS

PDF

79.1 KB Created: 2021-03-20 22:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd2d3c52e5c4694be749061f14759cca SHA-1: 5eae0c9a1c533cb5e22564d3c9660c7ed178145a SHA-256: 5a6622a73320e2a52ec48f9e2b32b763ae60565c9ed32cf972f55f848f2cf4d8
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 0.9997

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://maypoin.ru/strik?utm_term=how+to+get+through+college+algebra PDF link annotation
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/79ec2.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/quimica_inorganica_atkins_shriver.pdfIn PDF document text
    • http://topepuxabi.iblogger.org/everything_is_illuminated_free_download.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/19005138754.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/synopsis_of_the_little_prince_by_antoine_de_saint_exupery.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/92857177361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499633/normal_60362d6f2bdae.pdfIn PDF document text
    • https://wufomuwu.weebly.com/uploads/1/3/0/9/130969972/podulukafosume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_6031ec19853d9.pdfIn PDF document text
    • http://bexukavinawexov.mygamesonline.org/balzac_and_the_little_chinese_seamstress_full_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fdbe0a4ddcb0.pdfIn PDF document text
    • http://limebago.iblogger.org/feat_of_daring.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5fe3408fa301b.pdfIn PDF document text
    • http://nutopul.22web.org/azhage_azhage_edhuvum_azhage_song_free.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/84220254723.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nudoritane.atwebpages.com/the_seven_principles_of_the_happiness_advantage.pdfIn PDF document text
    • http://buzanuziti.myartsonline.com/dewew.pdfIn PDF document text
    • http://matixonapoler.epizy.com/block_site_extension_chrome.pdfIn PDF document text
    • http://kexomun.myartsonline.com/showtime_rotisserie_turkey_breast_cooking_times.pdfIn PDF document text
    • http://rurebafib.onlinewebshop.net/ms_drivers_license_permit_test.pdfIn PDF document text
    • http://kuwademepekipil.epizy.com/because_of_winn_dixie_book_worksheets.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 5076 bytes
SHA-256: 3687414eaaf426c374ece43d96ced710ad4c620b05ca55ea8c313c075ceaf67e
font_01_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 11400 bytes
SHA-256: a31d5d54a4ff82b00877659c2884c8ae0f20a4e732150d4e07ce2b3fb4ca3853

Open this report in the interactive analyzer, or submit your own file for analysis.