Malicious PDF — malware analysis report

Static analysis result for SHA-256 86977142f294f14b…

MALICIOUS

PDF

73.8 KB Created: 2021-03-01 11:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6ac9131a8dbed00e3374c883f5a4d69 SHA-1: 5ef7e2d40e00ee3cf5db09d50391a7853b977ac7 SHA-256: 86977142f294f14b5d67998065000a6b513938e0b0b9298bf9cb22cb3392bd28
146 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. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://maypoin.ru/wix?keyword=southern+colonies+impact+on+culture PDF link annotation
    • http://hiziryigit.online/what_does_a_mental_status_examination_showj4d0c.pdfIn PDF document text
    • http://agent-spv.space/zovabinamevoputoqavi2.pdfIn PDF document text
    • http://italywow.pro/uchiage_hanabi_sheet_music_pianoywpmt.pdfIn PDF document text
    • https://xupovefodifej.weebly.com/uploads/1/3/6/0/136053951/e00765.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/what_is_the_blue_book_value_of_a_2007_honda_accord.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/8811701.pdfIn PDF document text
    • http://albatros-trans.ru/what_is_an_ethical_dilemma_in_nursingwn8pv.pdfIn PDF document text
    • https://kagujovo.weebly.com/uploads/1/3/5/2/135298661/4287260.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/sanawexznpv.pdfIn PDF document text
    • http://serviceforyou.site/78397293545ffeam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/16232836192.pdfIn PDF document text
    • http://kefekebew.rf.gd/29554688466.pdfIn PDF document text
    • http://kepinud.rf.gd/space_in_html_form.pdfIn PDF document text
    • http://dirujuwut.epizy.com/android_studio_l_g.pdfIn PDF document text
    • http://sajurewe.rf.gd/alina_baraz_full_album.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_off0000e372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 5276 bytes
SHA-256: 88b5911669899cc08ab1812f0ffe5d2275e52002d8f4e90ff79cb01436509664
font_01_sfnt_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 10720 bytes
SHA-256: f27a3fb1718e7984a1e02ba119197bdc4b1122355e348c53e774d6ffe2dc6347