Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02d551107eec380…

MALICIOUS

PDF

73.8 KB Created: 2021-05-09 02:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 863fc29a2fefda9366404e4ff40f2667 SHA-1: 722a28a96195bc4c66a90840a8fb26920228872f SHA-256: b02d551107eec380ab8d387634de7ac0bca7a6d208fd927ba45513cbfd83023e
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 0.9998

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://xajibur.ru/strik?utm_term=2008+dodge+grand+caravan+se+tire+size PDF link annotation
    • http://rolivazugatar.scienceontheweb.net/aristotle_metaphysics_book_1.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/cual_es_la_formula_del_volumen_de_un_prisma_rectangular.pdfIn PDF document text
    • https://vuxamirajuka.weebly.com/uploads/1/3/6/0/136082549/eb894a4b7ba.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/Wja4gen/tibotagapajuduw.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/wQ4DjjW/povilerimibewokolemuzo.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/sat_large_block_answer_sheet.pdfIn PDF document text
    • https://jizidetaji.weebly.com/uploads/1/3/4/6/134626841/6485974.pdfIn PDF document text
    • https://cdn.sqhk.co/fafovewidom/5v8jagi/anger_of_stick_100_mod_apk_1.pdfIn PDF document text
    • http://winewelimefavo.iblogger.org/filurifogokudam.pdfIn PDF document text
    • http://gakofanotizukab.22web.org/wire_amperage_chart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1741ac14-06c4-4b53-9a50-39204fa30aa7/wopodituvijirigibin.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/kuzurug.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/diwali_invitation_card_templates_free.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/1436717040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54221a01-3dd8-422e-beac-b4d8616500dd/who_discovered_electricity_first.pdfIn PDF document text
    • http://numelini.epizy.com/37154838171.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_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 5560 bytes
SHA-256: dc5e33e8b1deb36e998c4816631b399915e8f052ea586287a91673466f589b4b
font_01_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 10680 bytes
SHA-256: 4d3d3549bc7282470d927818151098a973d1e84ebe5e90c2505b4a58d80b6190

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