Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c0f6fae649b262…

MALICIOUS

PDF

83.6 KB Created: 2021-03-21 02:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4cca5ac796125d372703b4c60a9fc296 SHA-1: d5a236e64ebff81b173b63d7336c2bdbefaf6060 SHA-256: f6c0f6fae649b262564ee000987d4b956cbf02279a10bf11216e8b1821857d27
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 0.9990

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://fokemale.ru/strik?utm_term=how+to+create+a+likert+scale+in+word PDF link annotation
    • https://bazademirijef.weebly.com/uploads/1/3/4/4/134464354/levoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_6041d42d88198.pdfIn PDF document text
    • http://wowitaly.pro/over_the_garden_wall_highwayman_animationmkoo5.pdfIn PDF document text
    • http://dronextactical.xyz/62411757764wqp1d.pdfIn PDF document text
    • http://milky-rp.space/dytto_barbie_girl_mp4uq02c.pdfIn PDF document text
    • https://ditakusoboke.weebly.com/uploads/1/3/1/4/131437623/8590792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_60024abe86062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_604b143eed937.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/celiac_disease_diet_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490266/normal_6045f9243b792.pdfIn PDF document text
    • http://hook-up.fun/kudegexux0p94e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5fc5cbc0556dc.pdfIn PDF document text
    • http://zathkatow.xyz/149861875718q0q9.pdfIn PDF document text
    • https://munemajof.weebly.com/uploads/1/3/2/3/132302982/pokutakimef_jupon_waxoti_gosamazuvi.pdfIn PDF document text
    • http://13millions-warzone.store/courageous_conversations_compassileh2.pdfIn PDF document text
    • http://grizhoff.ru/netcut_pro_apkpureeh00c.pdfIn PDF document text
    • https://tupevunokojig.weebly.com/uploads/1/3/1/4/131454116/rodijawewaselu.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/burnham_revolution_boiler_troubleshooting.pdfIn PDF document text
    • https://vatopefo.weebly.com/uploads/1/3/1/3/131398509/809a6c93fba3.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/basics_of_networking_concepts.pdfIn PDF document text
    • http://nuverlites.online/vivofit_jr_2_star_wars_appvpr67.pdfIn PDF document text
    • http://ludshop.xyz/92857597728fsaxm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5ef4b8d2-bb3f-426f-a6d8-212937b25ce4/kaxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbe796a-42a8-439a-b9e3-07fa301ab56b/black_boy_haircuts_designs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC6 4840 bytes
SHA-256: 9e8e8e23409c113a1c9a7d623f609ee936b6cb73082633d16bf3ef991ee7b3d2
font_01_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 10672 bytes
SHA-256: ae2fa072c4454e49a6ef3fdd1b1599411346091bc8dcbd144c0ebfc4c0068114
font_02_sfnt_off0001328a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71