Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0374329f76780c7…

MALICIOUS

PDF

91.5 KB Created: 2021-05-11 16:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c5b8065df0ef04798e38752d75313194 SHA-1: 5bd80aee4aca3e321d45a2d9bab04a3a6018f650 SHA-256: d0374329f76780c736aae62a688405a2e4bdda3557d2003e14efdecfeb9d335b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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/strik?utm_term=makita+ls1013+for+sale+uk PDF link annotation
    • http://dokeximikeveved.iblogger.org/holistic_nursing_care.pdfIn PDF document text
    • http://pitushok.space/strappy_back_formal_dresssqhyp.pdfIn PDF document text
    • http://sovetnik53.ru/how_to_restart_your_fitbit_versa_litey2zxc.pdfIn PDF document text
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/zenijoboxazabet_pesikod_padijonefarovaj_bitolivadevuv.pdfIn PDF document text
    • http://manekobe.22web.org/sokavup.pdfIn PDF document text
    • https://timitadenemegi.weebly.com/uploads/1/3/4/7/134728598/gavaxotukijuj.pdfIn PDF document text
    • http://dudisukogonox.iblogger.org/bible_study_worksheet_on_faith.pdfIn PDF document text
    • http://blu-ital.space/62833706733qkegr.pdfIn PDF document text
    • http://guwajokuxo.22web.org/zarasosomixozijapefikum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5fe9b325c5c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483089/normal_603b91dcb0d76.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/dd6631.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
    • http://xodepew.epizy.com/dawipudi.pdfIn PDF document text
    • http://sijujoxavenede.rf.gd/bariatric_keto_diet_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/573eaf57-f31e-4f2f-867d-fb33bd4ad0be/nitusapikuvozeve.pdfIn PDF document text
    • http://lefabeku.epizy.com/80765593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fa468f-e71c-4c54-ad2c-250fedf49ef3/click_clack_moo_the_cows_that_type.pdfIn PDF document text
    • http://xonutese.epizy.com/19323007345.pdfIn PDF document text
    • http://giduzorim.epizy.com/tudotodubifezis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd687cb1-df0b-4721-909a-cbe3c44ef888/wuvezuvodegap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11443787-f434-4a5b-b506-de188c31ba5f/how_to_check_kenmore_dishwasher_filter.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_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 4964 bytes
SHA-256: 0896b37b6917b9398887f02bc020588392e0bc0f61f9edd3d5963bbf656ccb2b
font_01_sfnt_off00012ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE7 11100 bytes
SHA-256: 626a631881ddc3496379902574405d18c13dde29f66b2ffbdd463bfbbe48eca6
font_02_sfnt_off0001529f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1529F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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