Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1e0f08dcd67764…

MALICIOUS

PDF

79.0 KB Created: 2021-03-24 20:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b656d9175be1ac89fd9d83ae8c1d466c SHA-1: 4ec9ab2340f1f1dc59ddbc3d8cdb684b41be59d9 SHA-256: 1e1e0f08dcd6776445a4f43fc3356174e4f2ef8e89e0d9dc0a565199e7a5e660
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing pages, and the document's structure suggests it's designed to distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://vilenefex.ru/strik?utm_term=saber+que+vendras+con+letra+y+acordes PDF link annotation
    • https://cdn.sqhk.co/guwuweri/ihgdrgh/webnovel_beauty_and_the_beasts.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/0jeTZNs/latest_2018_games_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/jnijqgE/90420677780.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/cxKijUi/55381340711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385410/normal_5fdd30e924bd3.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/iaYibyr/us_top_40_urban_radio_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/UjfijHJ/97727719274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470683/normal_5fcfb27939830.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/6icieSF/chondriospheres_are_formed_due_to.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/jddpaTr/pezuketoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_60524040625a5.pdfIn PDF document text
    • https://cdn.sqhk.co/sozimelizak/0Zhejfv/43825030877.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/m9ihcUM/best_anime_wallpaper_iphone_xr.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://f1fb087f-5d49-4061-aa02-230b108315d3.filesusr.com/ugd/645068_aacf7023da43483592802dc42a45334e.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_d1f7996eee9042708ff374b5df812182.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/gaap_ifrs_differences_balance_sheet.pdfIn PDF document text
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_f77b1861708f4f0c85cc18fa5e5022a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubeto/does_bose_speaker_work_with_android.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_77f5b3ee5e1a411cbf6fb6633f6e0629.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/tonaliwage.pdfIn PDF document text
    • https://21dbc830-6d60-48ad-8ab0-00d2b3cb69e0.filesusr.com/ugd/18d949_3a368846bd254faeb04673af5b19a1ba.pdf?index=trueIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_4e7af599e9234ca5a3a86c041084e3fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/snow_white_twisted_tale_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/electronically_controlled_manual_transmission_cars.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 5300 bytes
SHA-256: 1dd3d42c9c00e215fa70ff2deadadd5a6a69a08f709461e463cf31d1a24ec441
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 2140 bytes
SHA-256: ef6f110d6c32cafd5c99a09e533c9b3253624b651efd007c4391eb0be2506ed5
font_02_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 12176 bytes
SHA-256: 2660e61b011bfd5a837828ff163041678b75b6fea37f60c4d7d228f0e02fa30c
font_03_sfnt_off00011e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E20 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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