Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac2dd578316477a…

MALICIOUS

PDF

83.8 KB Created: 2021-01-17 00:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b7afee24fd01834fbd54a71a1e17da8d SHA-1: 9945cb2e86f7f0ebaff44f9bdaff306dc257470d SHA-256: dac2dd578316477a5c32608a089cd1c661546a263825a8913c1511c348786f25
214 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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.
  • 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://cctraff.ru/123?utm_term=forgetting+sarah+marshall+watch+online+123 In PDF document text
    • https://jatakusikafe.weebly.com/uploads/1/3/0/7/130776866/1955988.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/1492632.pdfIn PDF document text
    • https://site-1171373.mozfiles.com/files/1171373/18381585541.pdfIn PDF document text
    • https://site-1176991.mozfiles.com/files/1176991/smithsonian_channel_app.pdfIn PDF document text
    • https://site-1176864.mozfiles.com/files/1176864/chest_guidelines_9th_edition.pdfIn PDF document text
    • https://site-1178359.mozfiles.com/files/1178359/30345465747.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/felarilet.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/muvemasoxaji/formal_address_in_russian.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/28134808346.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/mizuzatumiwulukejini.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/rided.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/241907625.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/watch_jumanji_123_movie.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 5608 bytes
SHA-256: f6f030dbc6455a2d17c8d3fd01ea09c1fc6edfcaf1f06ec5deb56b59bca5d0e9
font_02_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 11404 bytes
SHA-256: e68408b4a3bad616d8cbbd9bba9d930fd29b0b770f1335e72e8840ac837ca097
font_03_sfnt_off00012b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5A 16492 bytes
SHA-256: ec22e1757573f2a718020ddf6ba02a9f6d29c41c11eb6c16b208381dab0c36e1

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