Malicious PDF — malware analysis report

Static analysis result for SHA-256 a600b0279c8bfbd4…

MALICIOUS

PDF

67.0 KB Created: 2020-12-23 06:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6026b639b6680407310fba5fbf62dfb6 SHA-1: 9f3f6371590eb07e98694e2490832ff4a1ee740f SHA-256: a600b0279c8bfbd436125fad9c1d01d23ec1ad4cb749c63d8f04c2307b5f8276
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file, identified as malicious by ML classifiers and ClamAV, contains numerous external links, a common tactic for phishing or SEO spam. One prominent URL, 'https://trafffe.ru/strik?utm_term=video+calling+apps+for+school', suggests a lure related to video calling applications. The presence of embedded links and the overall structure indicate an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=video+calling+apps+for+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0f0870d748.pdfIn PDF document text
    • https://badexakabenal.weebly.com/uploads/1/3/4/0/134017850/28b339f.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/goxovunixaliba_zilege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8cf9dc4cffc.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/rijaliwiguvex/ap_lang_rhetorical_analysis_essay_example_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/wobeworuki.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/anurag_and_prerna_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/wrong_turn_1_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/baxew.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/imperial_death_march_clarinet_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf1455eb2b3030ab3bc75e/t/5fdf8ab2e64f5703153fc872/1608485556527/kevudepeki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc594e3084698658e7e1dcb/t/5fc75ad65060c93fcd7c526c/1606900439177/fopifonosogazijenefej.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/11488511782.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/wwe_205_live_results_bleacher_report.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_off0000ca55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA55 5384 bytes
SHA-256: 758389fdceb226fde96d184c42f1fdea26dcd0c8a21b37cfb7194b75bb269c00
font_01_sfnt_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 10172 bytes
SHA-256: df5d85227657fda19bcbb90f6d43a707cbd0207a052073b230118c681c5ffacd

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