Malicious PDF — malware analysis report

Static analysis result for SHA-256 72732f1b66a7511e…

MALICIOUS

PDF

73.2 KB Created: 2021-02-20 14:07:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cce0d4fadd153db92381af2044d9ba7b SHA-1: bc499b75d0a2097b083b33de3589f276919c3217 SHA-256: 72732f1b66a7511e4951e5e2c9b98daa379bbe87b82a10d9d3b2a48266323a65
76 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that mimics a search result for a specific hardware problem, likely intended to trick the user into clicking it. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the presence of an external URI suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jottigo.ru/strik?utm_term=dell+e5450+battery+not+charging PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427544/normal_5ff810763739e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ff80ef3e0e98.pdfIn PDF document text
    • http://malalij.iblogger.org/intel_android_usb_driver_asus_zenfone_4.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/Whdiahe/dr_davey_hand_sanitizer_recall.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_602584789b382.pdfIn PDF document text
    • http://roman-holidays.shop/ions_equation_worksheetfryyj.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/GihAhik/wize_enterprises_ludhiana_address.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/RY6DUnY/proxynova_wifi_password_hack.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/zepifudoxapo/blossom_blast_saga_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/agneepath_songs_ringtone_free.pdfIn PDF document text
    • http://suzebotazolonav.epizy.com/93323125169.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/example_feasibility_report_software_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/wazirat.pdfIn PDF document text
    • http://rusuxipek.rf.gd/2263005663.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/sogulovemuviwizi.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/pebisigiluz.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/54276233985.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_off0000e184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE184 5476 bytes
SHA-256: 30d0ea1f41758c51c112122e92fb67f3ad34427640385b8c5a98a1db0acafcca
font_01_sfnt_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 10448 bytes
SHA-256: ebc01a559a4bf245e560f15acee0bc4ac17d63dc410e7d38afe6a1a513b7b2b7