Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9be6eef6d2f1c3…

MALICIOUS

PDF

66.6 KB Created: 2021-03-24 19:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: affe9c84e14b8997f3b482c455ae30ae SHA-1: d4322610244f8be77b1360983fd2db497caa4e0a SHA-256: 1e9be6eef6d2f1c3a148069f921ea36e5fd164d8e09e941c3fd96062eb3db539
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. The document's content and heuristics indicate it's designed to trick users into installing malicious browser extensions or updates, likely to steal credentials or download further payloads. The presence of numerous external links, many hosted on disposable domains, reinforces this social engineering approach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nipisod.ru/wix?keyword=arsenic+5%252B+electron+configuration PDF link annotation
    • https://cdn.sqhk.co/dawupana/giiieoq/sukabujogerubabuzi.pdfIn PDF document text
    • https://masulawumesomok.weebly.com/uploads/1/3/4/7/134716226/deras-pajak.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/4heLjem/94422575005.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/ehghhgj/69167326859.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/fffiahh/xekibegisaduse.pdfIn PDF document text
    • https://wosumugip.weebly.com/uploads/1/3/4/8/134867897/bixotofafugodel.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/27034481218.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/sunolosemejika.pdfIn PDF document text
    • https://cdn.sqhk.co/lajagika/QAjbhd7/67989465315.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/d4Hjfgh/deep_end_meme_song.pdfIn PDF document text
    • http://kyhni.site/android_google_manager_7p0qfr.pdfIn PDF document text
    • http://blognews.top/the_other_side_of_midnight_granada_tvpfcps.pdfIn PDF document text
    • https://cdn.sqhk.co/kenalutaxi/fhhdi03/google_chrome_update_free_filehippo.pdfIn PDF document text
    • http://nyvelsets.online/2640372172aotyx.pdfIn PDF document text
    • http://taher-tcac.com/paradoxical_sajid_2_book_download4tdwf.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/DkaDfjg/mokitobipukafunavawimi.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/vejej.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/69c93ee9-db15-485d-8aca-f32997a2482c/jaybird_x3_charger_clip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a0cc0e-4b64-4627-ae3c-23799b9272e3/94113763136.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_off0000c8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E4 5164 bytes
SHA-256: a9f76db38f222f6253b596a87a55e31cd77512d67079d9576e26aba5b302739c
font_01_sfnt_off0000da8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8C 10272 bytes
SHA-256: fb7c0b9dd4af8565c0bddd8619cb1a7a10e054df81b615fcc0a3006dad1b9485

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