Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dfb2f9ba6ade50…

MALICIOUS

PDF

89.4 KB Created: 2021-03-18 17:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4a9d61073788b4553b383f96f120275f SHA-1: 52d6993830a54ea875237073fe5e37eff7b730da SHA-256: 13dfb2f9ba6ade50f4dbcb32b7fd3df14e5dd2232425f67bf3f633e6408d5d02
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://leonvi.ru/strik?utm_term=how+to+find+an+affordable+apartment+in+san+francisco PDF link annotation
    • http://bositozibab.getenjoyment.net/carrera_armamentista_guerra_fria.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/iic7idJ/blackberry_os_11.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/Sjigeys/14830990215.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/astaghfar_ki_barkat_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/FghHieV/guilty_conscience_070_shake_chords.pdfIn PDF document text
    • http://muvibigi.22web.org/41694692239.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/21330374811.pdfIn PDF document text
    • http://study-english-04.space/486252971436awsf.pdfIn PDF document text
    • http://lajulufubugo.22web.org/ajooba_movie_song.pdfIn PDF document text
    • https://cdn.sqhk.co/rutuliduzo/c8FOhat/denver_post_sports_reporters.pdfIn PDF document text
    • http://matimomewojime.mypressonline.com/57085537763.pdfIn PDF document text
    • http://tublitalia.space/32037221387s4t0g.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/ihMj34r/gudetama_tap_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/jgjj45N/widigekiwemodezatefaxega.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/b95b8c7e-6464-45b3-8402-660723f95fa8/44184684354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d49631e-18a8-4641-a9b6-96faff33d4d4/81225938070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab08c69-dbb3-4f90-9495-d41fda12ceb7/jufofinegusipale.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/delta_airlines_news_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab8f6c1-326d-4f88-912f-a0520a1cccca/what_is_the_best_example_of_newtons_1st_law_of_motion.pdfIn PDF document text
    • http://xisapedugifado.epizy.com/52408709224.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/xukezosawigevuxev.pdfIn PDF document text
    • http://vidodusiv.epizy.com/mini_cooper_certified_repair_near_me.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_off00011e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E01 5492 bytes
SHA-256: 2e6d8049553e19cc189f585748d17400f5adc21d5c18fa9ce12acd0752d0056b
font_01_sfnt_off000130a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A9 11552 bytes
SHA-256: ef1254bc25dc59563e4ce9d3ba0553c0d4f4980ec06fdce717ec74c13c93e275

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