Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9b7026c585c80f…

MALICIOUS

PDF

75.2 KB Created: 2021-02-23 13:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b2b0b4e52f1c349773d945d57180bb38 SHA-1: 67c040b1b7fae602bfca3dfe0a380b6d0bb2afcc SHA-256: 5c9b7026c585c80fb4718b5293776159c3e9ccdfb1a2f1ee1755dd4f2db7cac4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure for financial gain ('how to make 6 figures'). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to distribute malicious content. ClamAV detection and ML classification confirm the malicious nature of the PDF, suggesting it's a phishing or scam document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wb?keyword=how%20to%20make%206%20figures PDF link annotation
    • https://cdn.sqhk.co/mujowofapubi/nFuLwje/goat_simulator_goatville_trophies_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/papowepu/XTq8hg6/running_shoes_for_women_with_bunions.pdfIn PDF document text
    • https://jenazikefu.weebly.com/uploads/1/3/4/0/134017187/5475787.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwasowoset/ie3KifF/boat_drive_shaft_coupling.pdfIn PDF document text
    • http://rentline.pro/new_market_wizardsaouob.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/3T3iegc/ropuf.pdfIn PDF document text
    • http://uscreditscore.info/coniugazione_verbo_avere_forma_passiva0wpgs.pdfIn PDF document text
    • http://latuha.com/ganukenezena2he.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/i1BeCVn/jared_harrison_hunte.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/sidewujifanaz.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/c7gg4Vg/chapters_interactive_stories_invitation_code.pdfIn PDF document text
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/4a82cb6a.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/gjUyiiT/european_war_2_download_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/lopes.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/walumedo.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/79492734511.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/free_printable_wedding_itinerary_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/twitter_application_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/confidential_information_clause_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/7744568138.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/dengue_fever_blood_report.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_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 5100 bytes
SHA-256: fd80ff6a8f6e5aa6334d1e165aa9ab195f4d8a920c4865efd47bf212909f3bb0
font_01_sfnt_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 10096 bytes
SHA-256: 6484c8540327faedee2402ad4acb984782cfaa4aa202da07295977f6bc64d656
font_02_sfnt_off0001115d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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