Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fcc4c593696f0c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-23 04:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1752e955d57f500fdea016b47316e550 SHA-1: 3514ac379357c55878a3b399418c9a9c8d8fab43 SHA-256: e5fcc4c593696f0c958a8a7ab573db2c108b853c4bb15a7c480b48591701d4ad
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one pointing to 'baarspo.ru' and using a 'world+war+z+ps4+gameplay' UTM term, suggesting a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/aws?utm_term=world+war+z+ps4+gameplay PDF link annotation
    • https://tusululobiwivet.weebly.com/uploads/1/3/1/1/131163859/4af332a1d089f3f.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/dd750f4.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/gloomhaven_cragheart_perks1l839.pdfIn PDF document text
    • http://fb-copyright-help-from.com/start_late_finish_rich5phlf.pdfIn PDF document text
    • http://copytoshka.ru/ipratropium_albuterol_davis_drug_guidezsj5q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_602a8096cab15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_600b54c36a1c8.pdfIn PDF document text
    • http://rat-red.space/iatf_16949_auditor_training_onlineysejr.pdfIn PDF document text
    • https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/51687daab1cbe.pdfIn PDF document text
    • http://lozajakar.iblogger.org/nidoxinojavimemogenagewes.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/b964237546.pdfIn PDF document text
    • https://sixisamut.weebly.com/uploads/1/3/5/3/135308299/paletak.pdfIn PDF document text
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/jarelemam-dulupixogetexuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koburolamugalo.rf.gd/15315578217.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/hp_smart_app_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/39778540508.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/13364956526.pdfIn PDF document text
    • http://jeguvixep.epizy.com/39003063277.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/american_truck_sim_mod_apk.pdfIn PDF document text
    • http://mudivakerimenog.epizy.com/free_email_bridal_shower_invitation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/zomewofazuxo.pdfIn PDF document text
    • http://zunaxixe.rf.gd/vasabanazupal.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_off0000e016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE016 5624 bytes
SHA-256: b4c43213cbbdf60f3e9d0b3aa630ab585bdffee21b941ffb19016e9f6f04dc42
font_01_sfnt_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 10072 bytes
SHA-256: 804291889155dbb29a42b1a1b5b9339c211738ca2a2cfee80cef351846d6d956

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