Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eda4538ea10f020…

MALICIOUS

PDF

76.8 KB Created: 2021-05-25 03:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 52352cb2dcfc43023dac155ae749522c SHA-1: b69b06e6ba54e5e1de545c585306cb8738236983 SHA-256: 1eda4538ea10f020c2a65bb4d3de5e1aedbe838779158f76cb6c9d237ae1fedf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely aiming to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=how+to+wash+a+mission+cooling+towel PDF link annotation
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/meruxo_wijalobakodem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501212/normal_5ff3ea7851372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402944/normal_5febae2081471.pdfIn PDF document text
    • https://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/446a287961a70c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_60261be32fbdf.pdfIn PDF document text
    • https://volovumonanegom.weebly.com/uploads/1/3/5/9/135967081/minusarobipolub-difimom-nexutinimagib-dumojivokatol.pdfIn PDF document text
    • https://dirotazu.weebly.com/uploads/1/3/1/0/131070105/ee0db4830c4c22a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486758/normal_60357735201e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxorojero/how_do_i_access_icloud_storage_on_my_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/66956425627.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/psychology_quotes_about_the_mind.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/action_jackson_movies_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/determine_the_density_of_an_unknown_liquid_and_an_insoluble_solid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853ea468-cf21-4234-8db7-77011d6e0e05/can_you_change_the_battery_in_a_vivofit_jr_2.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/veloka.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/benign_prostatic_hyperplasia_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/cadmio_informacion_elemento_quimico.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/paturajotamil.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/33407557887.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/how_to_replace_blades_on_toro_zero_turn_mower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4722fbf4-7d4a-4380-a96d-b5ba862291aa/wemerefuvulesidezolives.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_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 5172 bytes
SHA-256: 9ca49381318505fdf6747ce4dfc035d93b6ee4ffcdf913cc273ae2f30c1f3664
font_01_sfnt_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 11104 bytes
SHA-256: 69f914e897bdc674767543aecf8101cb9d330eef3d1dd6497c3b43bd86a49a38

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