Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaf56ec1b3a57be…

MALICIOUS

PDF

76.8 KB Created: 2021-01-24 12:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6a6b8de29723b456fd6b4fbf6f73d229 SHA-1: 7a4cba9121bbf06c8da8f89fabe729a58a5e309b SHA-256: ddaf56ec1b3a57bee28abfcc29733f912bfb895f576945608291adda23b69dfe
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a "Certificado medico prenupcial pdf mexico". No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/aws?utm_term=certificado+medico+prenupcial+pdf+mexico PDF link annotation
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/valuvake.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/4649531.pdfIn PDF document text
    • https://kewivuzakokefi.weebly.com/uploads/1/3/0/7/130775129/54bc59c8d88c8d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_60082131b18f0.pdfIn PDF document text
    • https://zuwasaroniw.weebly.com/uploads/1/3/1/3/131380739/3816899.pdfIn PDF document text
    • https://rogipusuwegurak.weebly.com/uploads/1/3/0/8/130813654/luwevukabebun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496170/normal_5fdd37f270e25.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/vasata.pdfIn PDF document text
    • https://xapebetilozeze.weebly.com/uploads/1/3/0/8/130873864/c3e96d3a2a02fd.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/4423475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495251/normal_5fcefc4c02b9c.pdfIn PDF document text
    • https://disebaxixifos.weebly.com/uploads/1/3/4/7/134714932/fojurujixen.pdfIn PDF document text
    • https://jowatoziji.weebly.com/uploads/1/3/4/8/134893097/3448710.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/dipop.pdfIn PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/zikofedewimobib-bokojuzir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://towawemigegi.epizy.com/84615240497.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/rojatidoruzotinubuvatujiz.pdfIn PDF document text
    • http://labireninofut.epizy.com/52954685999.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/gloomy_sunday_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 5096 bytes
SHA-256: c6480b5e96148cb40139b360c291c1142a2204753ced7b65e9f3e740be53f2a3
font_01_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 10184 bytes
SHA-256: 6b66522517bfe471dedf0b44f8bb2a971432fa7a474c5150b3364d17c16b3181
font_02_sfnt_off000117a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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