Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee59cb7d9238460…

MALICIOUS

PDF

85.6 KB Created: 2021-04-14 09:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6755e71a6f09261e14547354e43d3caa SHA-1: 599520e9b65e657b21a64e835e408f6e620e92af SHA-256: bee59cb7d9238460b915dc8b8486588278073c58866458bd16e3ab2491708491
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9994

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://gimoguvi.ru/strik?utm_term=taco+bell+hard+shell+fresco+taco+nutrition+info PDF link annotation
    • http://rakivabe.sportsontheweb.net/18178843092.pdfIn PDF document text
    • http://tlgfree.xyz/fedex_store_hoursrvpx0.pdfIn PDF document text
    • https://cdn.sqhk.co/zoduxexawi/iyha4uw/ridiculous_fishing_guide.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/openstax_calculus_volume_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366063/normal_5fcba8aa7f079.pdfIn PDF document text
    • https://cdn.sqhk.co/libigekukaru/jmjjYPV/wow_classic_druid_resto_leveling_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426267/normal_6057b934b6182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390383/normal_5fe449d3b9f9b.pdfIn PDF document text
    • http://xbet1.fun/letusukowedeloxilixeys60r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_605f7acdb2c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_606abf8a4c1aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_60473a014853f.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/yjhjgdr/face_changer_video_app_android.pdfIn PDF document text
    • http://presentinsta.online/gikizijudugikatetawerugukpz1g3.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/jbOLiiR/world_leaders_2020_pictures.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/85397421986.pdfIn PDF document text
    • http://erogan-columbia.site/pawedokalerugamodenezi0n1c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://320f262d-053d-461a-9009-498fa3b044f5.filesusr.com/ugd/8e680a_addbe6197e9f40ec9bb784e19e67da0a.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_511d011fdd8f431882cebba4f62fc2aa.pdf?index=trueIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/4191013009.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/frontal_bula_profissional_de_sade.pdfIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_f584130efc6746b08c9384b6d2923c57.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_6cc2284d5e6b493bb82a9d07aa4af2dc.pdf?index=trueIn 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_off0001128f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128F 5196 bytes
SHA-256: d08c0e9c7e62d371703738b50bef74d026fea2309847dbb4c3d87aa15af9fe48
font_01_sfnt_off00012428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12428 10740 bytes
SHA-256: 40adb4fb36b5c672ae268d524ef0879e4ccb60591b144aaf7cfdbff93aa2b87c