Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeb4348b266eb6a…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 13:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 12d6e4679a650912aafdeb4570f77bd1 SHA-1: bcb3ca66e59e7a5e01e0148c655a408509207d33 SHA-256: abeb4348b266eb6a91dcd93f752946f79f77489c5fd6f62dd03d83a1350b97f2
254 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of multiple unknown URLs strongly suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the ML classification indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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.
  • 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://dafemum.ru/strik?utm_term=edit+in+paint+3d In PDF document text
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/rupatojonon.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/nepebikobu.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/zirotujajipigikaxolarez.pdfIn PDF document text
    • http://xemopubuga.iblogger.org/77108738222.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/bookstore_computer_systems.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/kixasedatufapewusip.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/4559354.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/defanefiv.pdfIn PDF document text
    • https://musazejat.weebly.com/uploads/1/3/1/1/131164110/vemuta_wapavuf.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/aae9d9.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/pogujix.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/jazofi/chrome_pixel_helper.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/caution_money_refund_application_format.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/xoladetavewab.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/verb_to_do_simple_past_negative_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/brahmagupta_mathematician_information.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/siduvefevaferanewebitute.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/dynamics_nav_licensing_guide.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/69221569843.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/97333989966.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/8727898064.pdfIn PDF document text
    • http://gaxugozoj.epizy.com/amma_nanna_wallpaper_images.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_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 4768 bytes
SHA-256: 2a447799315c475a8498b86a7ff89b4929a7716c3e102b2494d1160940a9d6fd
font_01_sfnt_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 10144 bytes
SHA-256: 8963060748d2cf93e3999d5f7c9f5bfa7152a382e4efef545b6ecd544ddb96d2

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