Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f41607962cdb65a…

MALICIOUS

PDF

83.3 KB Created: 2021-03-28 23:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e3ff59d6ca69943d6b6b4dc207b171a SHA-1: 51105b723f535517238bc982063af37f45cf137d SHA-256: 7f41607962cdb65accd8b49430c6c7388f6bf07d43325dea56551f1c70f92a32
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 0.9996

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://baarspo.ru/strik?utm_term=funny+short+stories+in+english+pdf PDF link annotation
    • http://fiteduwad.22web.org/62289556646.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/58222536762.pdfIn PDF document text
    • http://ripugusulufiluj.getenjoyment.net/us_stock_market_futures_marketwatch.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/polaroid_sx70_film_vs_600.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
    • http://zosetuguvajisu.epizy.com/39152941360.pdfIn PDF document text
    • http://liwusetokabozil.epizy.com/zewobuzumivoxotuzerovuka.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/bledsoe_custom_knee_brace_order_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b713da-4014-4043-b311-1505bf9cda0f/zorodof.pdfIn PDF document text
    • http://dipuritaxuxok.rf.gd/fuxiwelidesinomawakugenus.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_8661ba674d1d477e95a40c06d754e6b6.pdf?index=trueIn PDF document text
    • http://zuvovebedevavu.rf.gd/athol_fugard_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b038cf8-4a20-4324-ac6b-b23e5593965f/tusumifunenuwemunix.pdfIn PDF document text
    • http://supetok.rf.gd/kupugivelufomutikavo.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/kuviruvesofapiwikos.pdfIn PDF document text
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_d70e75a87a604af1a1684897bd313b61.pdf?index=trueIn PDF document text
    • http://rumakepalo.rf.gd/api_platform_filter_multiple.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/jvc_kd-r860bt_wiring_harness_diagram.pdfIn PDF document text
    • http://luvoxijamubisur.rf.gd/rassembler_plusieurs_documents_en_un_seul.pdfIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_036b6df0f5624190b965b93426af3428.pdf?index=trueIn PDF document text
    • https://ac25a69f-a984-4293-9c3d-8c9e0f062535.filesusr.com/ugd/cbf077_2897c4a5702d43d38b7e9a34d2ba6bf5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/68461784257.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_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 5032 bytes
SHA-256: 017301fb0d6b43b0875265b7acc4234d095af25ce6af10999af9f51eaf4bfbb0
font_01_sfnt_off00010d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 10632 bytes
SHA-256: 2bb8550516d98b5bea603c0e95ac9c2c10d5c713e4a715dcb717e21530c431d7
font_02_sfnt_off00013198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13198 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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