Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7863c53a99c4d9e…

MALICIOUS

PDF

77.8 KB Created: 2021-03-16 01:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5584279cc657c1f4fb1eb65391724c3e SHA-1: e25d5acdcb01032b2b21fec967f7a7423e175472 SHA-256: d7863c53a99c4d9e84b1728502290d87469068238add2f2f2532057910e07c06
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic and the ClamAV detection. The primary URL, https://ponafet.ru/strik, suggests a phishing or malware distribution attempt disguised as a search result for software alternatives. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest malicious intent.

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 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://ponafet.ru/strik?utm_term=best+free+deep+freeze+alternative PDF link annotation
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/xizazewu.pdfIn PDF document text
    • http://vipinisejes.22web.org/zejufij.pdfIn PDF document text
    • http://venira.su/indian_stock_trading_strategiesyargj.pdfIn PDF document text
    • http://italia-doc.space/carbs_in_dunkin_donuts_blueberry_cake_donutxoxk0.pdfIn PDF document text
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/9c166.pdfIn PDF document text
    • http://naturmilans.fun/the_non-designers_design_book_4thgr98l.pdfIn PDF document text
    • http://complerbnp.com/nogojavozemabalisa1fv8l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xodojes.epizy.com/xojobora.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/word_2016_shortcuts_not_working.pdfIn PDF document text
    • http://fisuzes.epizy.com/41612736805.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/piwalawejulonuvilegewisa.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/78614663691.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/juventus_fc_news_bleacher_report.pdfIn PDF document text
    • http://nodezolejew.epizy.com/somagolufixakuxeletuzi.pdfIn PDF document text
    • http://gafamiziwadi.rf.gd/30355244071.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/how_much_is_a_2006_gmc_envoy_denali_worth.pdfIn PDF document text
    • http://rafopaju.rf.gd/embryologie_appareil_urinaire.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/precipitation_reaction_in_chemical_analysis_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/autohotkey_rapid_fire_script.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/ffxiii_mission_guide_5_star.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/baxefokutamulid.pdfIn PDF document text
    • http://burelagufepe.epizy.com/85407603532.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 5192 bytes
SHA-256: 9ddedf2febac06f083232bf1a331f6f1a12835c70cc39a0685752bf78a6b577e
font_01_sfnt_off000102c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C5 11016 bytes
SHA-256: b331ca56869eacc1c486cfece9ae8d70559d222920bf0b4b3f3a705fcdf5ba4d

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