Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eaa8e4fd7e75e38…

MALICIOUS

PDF

78.1 KB Created: 2021-03-20 20:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 21e9c13151743eccec967d1bc8db433d SHA-1: 1b572f14b94e1e1f5277de3ecbda616ae8a6ab11 SHA-256: 1eaa8e4fd7e75e38c0d7b6765cfccca93f1473c0d3a17d9fb62e45bbb6ecc5e4
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/strik?utm_term=how+to+turn+off+hayward+salt+chlorine+generator PDF link annotation
    • https://cdn.sqhk.co/valujoper/icFFnfA/lekubelife.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/helNjc8/27607701403.pdfIn PDF document text
    • http://philonio.online/long_lost_family_episode_guide_2019tsyhd.pdfIn PDF document text
    • http://shopwithsale.website/zufidodamoxokexiwaij5.pdfIn PDF document text
    • http://topcreditscore.info/margin_of_safety_accounting_formula5v684.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470981/normal_5ffead9a9360c.pdfIn PDF document text
    • http://hackins.site/13118395823yxqlx.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/zlvo7ij/anime_live_wallpaper_mod_apk_3._3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_603d739695c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_6038365abba09.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/e71ebf94-7c4b-4c2d-81e4-b1ed2544cc3c/zivimajezerujov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4868b0c-5e70-47e6-a69f-02114462a59c/powermate_5500_generator_manual.pdfIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_f9aa5b510333454bbe5f525b715e7835.pdf?index=trueIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_26355e5ba246401cb2e3342cd4f6bee8.pdf?index=trueIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_521d11e7c0a24f3fbd49ef58fe39636d.pdf?index=trueIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_f0eca43bf0674f728ca018f50aacfbc6.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_f4abb47f54274020a85b1e22dc9e2c40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede70a4b-b40d-4b8f-99ca-4461c956fcf9/19842826855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4e20bf-b804-497b-9af7-f5578f34f4aa/77923039423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111e25e0-3115-404c-8bc2-d7c58043578f/57319392289.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_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 5436 bytes
SHA-256: 47d989c958ad11b147d5fd85af2a46659e2d74a33f3f551bf68787b74fccaa65
font_01_sfnt_off00010386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 11724 bytes
SHA-256: 27653814e07289de97e6ba0b0596175f6cc8429c5d0b9b0d3e704bfa02b71126

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