Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f01d52e89ef105…

MALICIOUS

PDF

78.0 KB Created: 2021-03-24 16:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a57c308f3a33365a55717173c6637c9d SHA-1: 8074b7627a56348813dfb0d1ce2afd44b45c6733 SHA-256: b6f01d52e89ef1056f9289e65f3e572e56d3203aa0b438d691bc7c6f5c8e0dc8
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://lozipotod.ru/strik?utm_term=stampante+epson+wf+2630+come+cambiare+le+cartucce PDF link annotation
    • http://getallcreditscores.info/absolute_value_review_answer_key5wm68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481993/normal_603ed02eb1a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_601766e185da3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426543/normal_60165745a1133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_60446e2e45f7d.pdfIn PDF document text
    • http://xxlmature.site/watch_dogs_2_hd_wallpapers_for_androidc5qxf.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/yfeXjiU/history_of_world_civilization_to_1500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464521/normal_5ff5faa69de07.pdfIn PDF document text
    • http://mazers.fun/chale_aana_whatsapp_status_video_wapwonp7pbm.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/ifhdGgc/47779881301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_603ed5dabf2db.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/8gigebU/ponibezabawefejekijimegak.pdfIn PDF document text
    • http://tojubilabesi.22web.org/annamayya_telugu_full_movie_hd_free.pdfIn PDF document text
    • http://good-production9.site/vofin019hz.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/ifdhbhb/xadugonidozofesov.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/iibjcji/smash_bandits_racing_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/ctdjiZZ/free_movie_catalog_software_mac.pdfIn PDF document text
    • http://waniwidolo.66ghz.com/danby_dehumidifier_reviews_70_pint.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://jijopefugowebe.epizy.com/international_standards_on_auditing_handbook.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_off0000e038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE038 5968 bytes
SHA-256: 116c7a0449706431eba4d0fc670ce30d80bd9bb73a49f99e89bfa911e1f8194e
font_01_sfnt_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 11524 bytes
SHA-256: b8d1500421b2ccaf35a46ec0f656ecabda9b75aba6acf1fad63e6c952cbf4699
font_02_sfnt_off00011a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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