Malicious PDF — malware analysis report

Static analysis result for SHA-256 db86b56d0e09b6f1…

MALICIOUS

PDF

86.5 KB Created: 2021-04-04 01:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0a93f1e8c6c663c29fd608226bdd697f SHA-1: 53ea5fb580dd6af9e7eb8d1eaebdd48f211e7267 SHA-256: db86b56d0e09b6f1d1bb11857dc38f62a6a9f862f577dbef5e66b923fdb09e93
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs that redirect to a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://dugedepap.ru/strik?utm_term=the+secret+teachings+of+all+ages+1928+pdf PDF link annotation
    • https://cdn.sqhk.co/duputokodoz/hjhiig9/59004487053.pdfIn PDF document text
    • http://sunazuwu.iblogger.org/salesforce_admin_certification_study_guide_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jobebakegip/Wib4ha0/britain_s_got_talent_2019_winner_performance.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/72549620073.pdfIn PDF document text
    • http://iwhite.space/dumopokinigijokuguvuvofuz6zmdz.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/75318713205.pdfIn PDF document text
    • https://cdn.sqhk.co/betarudigi/zFhjghe/13754865895.pdfIn PDF document text
    • http://xsale.trade/cae_test_1ikmz0.pdfIn PDF document text
    • http://hs-life.ru/thank_you_email_after_meeting_templateqbqtw.pdfIn PDF document text
    • http://whitecheat.xyz/golf_5_2.0_fsi_engine_code9pqx8.pdfIn PDF document text
    • http://mybestchan.online/keppra_100_mg_ml_bulazfstk.pdfIn PDF document text
    • https://cdn.sqhk.co/vonofuguniti/fVgjDgL/70476602466.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/qYhgoNc/jejepewikufogesugazejumuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba62e71-8977-4cfc-8ea3-24cf962e4410/2006_bmw_330xi_engine_code.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/59866834110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb49a2c1-d0d2-4c3c-aab3-889122aa4239/25484742135.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/bobamepafedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03995e38-8763-4548-98e9-c41d5577543d/93556579006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b97fc6b-bb36-4025-8ca8-7d9b283fab07/pebble_watch_2012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c8aad0-ef5e-4703-a495-0205f1853709/49587161117.pdfIn PDF document text
    • http://gubadif.myartsonline.com/dasam.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/cabinet_ministers_of_india_2019_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/17515268342.pdfIn PDF document text
    • http://waminakukivexo.rf.gd/25629745314.pdfIn PDF document text
    • http://merofis.epizy.com/ataxia_cerebellar.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_off00011189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11189 5900 bytes
SHA-256: 705663bf2b7c1d48a4a1dd98eea2307de1d23ce6ef1fc3540f50e27676b10caa
font_01_sfnt_off0001259c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259C 11256 bytes
SHA-256: 38481c473533707fe68d70c5a083d2c4ac71fd50348c96b75b95c6618897b52a

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