Malicious PDF — malware analysis report

Static analysis result for SHA-256 26adb489d29b4643…

MALICIOUS

PDF

84.3 KB Created: 2020-11-19 00:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3d096a10fa7dd25cc40abd879abcb638 SHA-1: 1c0774c6a73e5bd7699d9d38089b93f32f2d2d78 SHA-256: 26adb489d29b46434492c3a29f997fdbb9d43b5048283a1217bc5e3f23585dc3
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. This suggests the primary purpose is to direct users to external websites, potentially for phishing or to distribute further malware. The ClamAV detection and ML classifier also strongly indicate malicious intent.

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://trafficel.ru/123?utm_term=rosario+ala+virgen+maria+viernes PDF link annotation
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/rakiwojekasuv.pdfIn PDF document text
    • https://lamalirigade.weebly.com/uploads/1/3/4/5/134595912/8688286.pdfIn PDF document text
    • https://rozujefugupag.weebly.com/uploads/1/3/4/0/134017035/5824363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5fb38cfe8a3e4.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/bodepova/fruitland_school_district_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/cinema_hd_movies_apk_ad_free.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/midnight_special_song_in_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af961ed9-1571-4b41-8e55-33bb68e7ac73/pretty_odd_album_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51f34cb-9510-4379-9a43-d090cbb66758/53317281103.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/xixaselivode.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/92484132325.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/labudewitekixarewarixiwem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d00af26-2e38-4274-b3f5-a103ffe8d0d4/besikadupexujazidedufa.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_off00010d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0F 5072 bytes
SHA-256: 737bb7f0188c2407f845a43660abc2362d4ceeab55d86efdaf15aab791880994
font_01_sfnt_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 11136 bytes
SHA-256: 5e22592fe3f949a74c8160891f68acee6a7b38b23ac7ac141e9fadade67884c1

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