Malicious PDF — malware analysis report

Static analysis result for SHA-256 a982d586c8da2395…

MALICIOUS

PDF

71.9 KB Created: 2021-03-07 11:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f4af2f6b04c11761bc796374ad42f910 SHA-1: b2290a4b0067e38f2d0b5f2de0fcda5af67c0264 SHA-256: a982d586c8da2395674b3d788ce792a09e369f1f19ba9b6540a8bf17e6d34a56
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using a redirector link disguised as information about 'wendys chili nutrition information'. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were extracted, the presence of a redirector URL points towards an attempt to lead the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gimoguvi.ru/strik?utm_term=wendys+chili+nutrition+information PDF link annotation
    • http://org-fruit.space/jodego9wh64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ff75df8d2db0.pdfIn PDF document text
    • http://vawokupe.iblogger.org/94531126725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419828/normal_5ff9a7b6c5a5d.pdfIn PDF document text
    • http://appless.space/786654037453m79f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460686/normal_60102c1fa0c3b.pdfIn PDF document text
    • http://ketrovk.xyz/bonadoxina_dosis_pediatricapm5o5.pdfIn PDF document text
    • http://the-glow.ru/40350916852y42dw.pdfIn PDF document text
    • http://helpcontactform.com/10770092954svehn.pdfIn PDF document text
    • http://wexypay.icu/fodobikesopisebojetoligoynbcn.pdfIn PDF document text
    • http://fesumebujurasa.22web.org/80795135794.pdfIn PDF document text
    • http://nedobujivub.22web.org/lcd_panel_datasheet.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/xanunafojuloki/camo_stencil_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/jozewogeseta.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/tirirofo.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/bivamokifatoriraturox.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/wazadokelise.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_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 5376 bytes
SHA-256: 30d04a433277e227eec92c52b5268ec081116c9a22e23ffb99383f1314d45678
font_01_sfnt_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 12380 bytes
SHA-256: 73ade3635e4d69c5979d3492272bdb9dc23519aae45be49f81cfaaccda231d8b

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