Malicious PDF — malware analysis report

Static analysis result for SHA-256 124689129c1f9424…

MALICIOUS

PDF

83.3 KB Created: 2021-02-23 18:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 593022212e257a9c08e6b9d77dcc6313 SHA-1: 5672e70bd3b14df6a0e0f482a6b29e9e969c7180 SHA-256: 124689129c1f94242ee8e6ab53434cbfca7be6aa49253c89c597787d336b44d1
192 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and disposable hosting, indicating an attempt to distribute malware or phish for information. The presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading a payload. While no scripts were directly extracted, the PDF structure and linked URLs strongly suggest a malicious download lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/123?utm_term=x+plane+flight+simulator+download+apk In PDF document text
    • http://kengoru.space/cyberpunk_2020_portuguescquzb.pdfIn PDF document text
    • http://choosenews.space/changing_fractions_to_decimals_and_percents_worksheetsb5epo.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/fatibavigagomesa1nu0e.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/x9858ic/wolf_4k_pics.pdfIn PDF document text
    • http://amsidisi.xyz/67842240606r0b49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393029/normal_5ff0e84262fc4.pdfIn PDF document text
    • https://fefujosiniw.weebly.com/uploads/1/3/4/8/134862858/bezejabelim_bazibine.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/hgxicgh/32498309421.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/Lhcidid/cheap_driving_schools_near_me_prices.pdfIn PDF document text
    • http://hh666o.site/julovega6zbz3.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/1616582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fce266142fae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/napebutarumajebosimo.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/amortised_cost_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/83951833057.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/bwssb_name_change_application_form.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 5588 bytes
SHA-256: 54d2479e98016c0e00b5b1c79b7957e2c607e583848f6753adccd0186112db18
font_01_sfnt_off00010574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 11084 bytes
SHA-256: d2c53decb73c43bf6a6cbe79dfeb7a71b23eefb0d7d3407d08e957d68e8675cc
font_02_sfnt_off00012aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAE 16092 bytes
SHA-256: 539903f09902c7a9236a5f196fd985d1e269eb676b64391e109d5a424ce2b52c

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