Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7b2127cf4b3520…

MALICIOUS

PDF

72.8 KB Created: 2021-02-23 14:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2657c784cfdaa0dd3673213c564ad3a SHA-1: b2e93002acf8aee5d0cae347032853c127f484ee SHA-256: db7b2127cf4b3520fa8319ee3f7b6337b47a624101e84b0ceb440d7552cce462
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI and an SEO redirector link pointing to 'https://druttle.ru/123?utm_term=accuair+e-level+calibration+problems', suggesting a phishing or scam attempt disguised as information related to 'Accuair e-level calibration problems'. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/123?utm_term=accuair+e-level+calibration+problems PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5fef9db95fb64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412161/normal_60049e2a8791d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_603022d088c7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5fd9d6e332665.pdfIn PDF document text
    • https://cdn.sqhk.co/tagorotage/Pbibgfm/slices_pizza_hastings.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/QhegddE/color_wheel_artist.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fcac403146a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401973/normal_5fdf19f4e4b34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371508/normal_5fc5ed7eed2dd.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/gfhi9mK/pitaxulifapuwevogigidota.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/xedewofuretujo/54612890856.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/28146212493.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/rofuvuxedawisegipulet.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/chemistry_revision_notes_form_1.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_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 5300 bytes
SHA-256: d37cb861a7177279a6647cccd2221e195d239040e03f4e909b2a4181d6b6c8c5
font_01_sfnt_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 10620 bytes
SHA-256: 002891b89c13ab4a5fd0296c56e9137fa85a809540fe22ff0f89ef29884ef53a

Open this report in the interactive analyzer, or submit your own file for analysis.