Malicious PDF — malware analysis report

Static analysis result for SHA-256 033a20b68f5e69bc…

MALICIOUS

PDF

73.9 KB Created: 2021-03-30 23:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1b762ab2d16181a9aba3e9fee8850c6 SHA-1: ea3e2513b4b80b3d3ddcb36ce257c6b337f99eb1 SHA-256: 033a20b68f5e69bc1514130d43e616884fa8653808f99d6fda5ae1940cd00e1c
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 0.9991

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://leonvi.ru/strik?utm_term=what+is+a+good+score+for+kaplan+nclex PDF link annotation
    • https://cdn.sqhk.co/gixotagokezu/1hbnij3/picture_editor_collage_maker_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/icXhjie/faith_and_fringe.pdfIn PDF document text
    • http://idealica-ordina.site/zezuzavikowarafikibumue7m85.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/yQjajbY/the_wild_darkness_tips_and_trick.pdfIn PDF document text
    • http://hesap-al-sat.com/tebulebw9jz4.pdfIn PDF document text
    • http://kolegutoravi.mygamesonline.org/fajapepowekeme.pdfIn PDF document text
    • https://cdn.sqhk.co/derilunadine/hiiojhp/xosiluromevinidox.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/dmzihri/sea_battle_2_mod_apk_download.pdfIn PDF document text
    • http://nukels.xyz/7792315346856dhy.pdfIn PDF document text
    • http://uggi-ugg.com/sawugefivumokugavigodjya4q.pdfIn PDF document text
    • http://sukalolijijegiz.iblogger.org/sorafog.pdfIn PDF document text
    • http://silvanozito.online/hp_officejet_4500_scan_not_workingocs78.pdfIn PDF document text
    • http://tells.fun/tebavugewanunosisosudu37n.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/natwest_bereavement_services_account_closure_instruction_formnpiv8.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/seganuvoligijixiziduwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_60025fe514c68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379486/normal_5fcf1aaf4c3da.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/dubakisiwaxusd06eg.pdfIn PDF document text
    • http://twitter-center.com/life_book_templatecv3kc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidujujesux.rf.gd/android_auto_wireless_adapter.pdfIn PDF document text
    • http://paxubar.rf.gd/behaviour_modification_model.pdfIn PDF document text
    • http://fazatela.myartsonline.com/xebaxabawobabikadesuxe.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/rokad.pdfIn PDF document text
    • http://vilumepidiwego.myartsonline.com/6919280036.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_off0000e002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE002 5564 bytes
SHA-256: 1dbb0fa2124550b3102491f29ae9cb1a2385f68642746ca35a92703e85eb24b1
font_01_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 11524 bytes
SHA-256: a93b909f4453a36c285ae5020ac7adbc99055e2e137450325c9f4a3d343fdec5

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