Malicious PDF — malware analysis report

Static analysis result for SHA-256 643f134f379e698c…

MALICIOUS

PDF

96.0 KB Created: 2021-04-01 20:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 469130ee053fb2c145312a8dd88f4e1e SHA-1: eb50e48e911ffdd902b6e3adf8abbd84b831044c SHA-256: 643f134f379e698ce95b13e36f44146d5bb950f437e48a1f7e0916c698485203
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 0.9991

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://kuzutuzo.ru/strik?utm_term=brief+applied+calculus+7th+edition+answers PDF link annotation
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/dogivi.pdfIn PDF document text
    • http://fegalaro.iblogger.org/55484338197.pdfIn PDF document text
    • https://cdn.sqhk.co/joxudilabi/rjjjheh/agregar_recordatorio_android_studio.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/zezugosukemafajanima.pdfIn PDF document text
    • http://detaxinema.22web.org/lugagelod.pdfIn PDF document text
    • https://kuwugexikoxol.weebly.com/uploads/1/3/4/7/134718068/luvad.pdfIn PDF document text
    • https://wazalitewisoka.weebly.com/uploads/1/3/5/9/135960923/c1796.pdfIn PDF document text
    • https://pefodiral.weebly.com/uploads/1/3/4/4/134476409/rezapusolefe.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/hifghih/briefing_paper_template_australia.pdfIn PDF document text
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/jepokofojumolozuf.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/7a362728-5ec3-4501-96e8-3eea118aa48c/did_zeus_and_aphrodite_sleep_together.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/caricatura_politica_del_porfiriato.pdfIn PDF document text
    • http://tevoburowuvule.epizy.com/jesetipojavomikexagadum.pdfIn PDF document text
    • http://vikuwopijoxu.rf.gd/56030530725.pdfIn PDF document text
    • http://xivutunitilema.epizy.com/definite_articles_in_english_exercises.pdfIn PDF document text
    • http://bowukedogatowo.epizy.com/p_d_full_form_in_computer.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/asthma_drugs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecb7713-a482-4860-a756-387ce0c10868/10000_reasons_ukulele_chords_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71f30bd-ddc4-480d-bd97-2043d2b3b41c/iata_dangerous_goods_regulations_2020_deutsch.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/65267986416.pdfIn PDF document text
    • http://sezajuvijib.rf.gd/pneumatic_system_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b078be-0232-45de-9fab-ef0e4905d2ca/81808311211.pdfIn PDF document text
    • http://lesodabat.epizy.com/9_regions_of_the_abdomen.pdfIn PDF document text
    • http://dulikidalipaw.rf.gd/cuanto_es_150_gramos_de_azucar_glass_en_tazas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210a2a54-02da-4dd7-a452-627f4c9d1d0a/40163987637.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_off00013af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF1 5464 bytes
SHA-256: 4bf94406f7e34edfeaa4ebc14cd9c96eb9770a1013e6fedcc5c5e27cf34cd611
font_01_sfnt_off00014d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D9A 10668 bytes
SHA-256: ef1d425dc7335e7790e30186cd4c30f29b0f4f5a966259ac7fbf61d6afb70487

Open this report in the interactive analyzer, or submit your own file for analysis.