Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62fc5e7e35c4486…

MALICIOUS

PDF

75.6 KB Created: 2021-04-24 10:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9bdf42d4798bac524a882974d18d66d1 SHA-1: 58cd3b64bab842c509aca2ef2ad0dda18bbdeebb SHA-256: b62fc5e7e35c4486ba92000de585e0433b13e0b0aab199271b8544f1ad75b52d
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://dafemum.ru/strik?utm_term=apple+books+online+login PDF link annotation
    • https://cdn.sqhk.co/zowonefaso/jIia4ia/67670029751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425491/normal_5fdceaaa9b3b2.pdfIn PDF document text
    • http://zunowugijose.22web.org/alarmmanager_android_medium.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366028/normal_5ffb5ca3c6730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_6053a0388932f.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/hgMtAo6/7976102584.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/eY5O0oN/zulofopituwul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_37eb164fbfe345228da0a8aa91dbb6ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasutiz/room_rent_agreement_format_in_marathi_word.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/24117872057.pdfIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_a6a657c03a9848b2b77ea859b891ac27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/99601911203.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_eaff49227fdc47ddadd6f5254a09391c.pdf?index=trueIn PDF document text
    • http://pugilem.epizy.com/amsterdam_tour_guide.pdfIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_8ee103a51bb54b1388d7984c620b442b.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_8798beba816547cfa75aa3f238642e5b.pdf?index=trueIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_b3b339a20bc4492ab411c568b26533f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/velleman_how_to_prove_it_3rd_edition.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_fa07255b228b41daad8e79c3c81fcfa5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/watajive/data_aws_iam_role_terraform.pdfIn PDF document text
    • http://sivabesu.epizy.com/welew.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_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 4876 bytes
SHA-256: f67ebe2aeb397f5431ae5add7a45409b02c60fb2d6af529567506b8b75949235
font_01_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 10692 bytes
SHA-256: b0c42bebeb3fcb93f24f6c65a4b4597bd93b9f7af0a73bac17814c0dacc75671

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