Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7be0a87d7ed1c09…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 00:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b0a3944b7e5d41bdb2c582c4ce20d2f3 SHA-1: 61916518111b9a39cd7ec7cb92592391ab447dcd SHA-256: f7be0a87d7ed1c0943ca46b30d3e85dccd3efd944a1de7a381fe66f0767d103f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7903

Heuristics 5

  • 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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/award?keyword=certeza+bula+pdf PDF link annotation
    • https://pekonupag.weebly.com/uploads/1/3/2/7/132741447/litidezokemugapok.pdfIn PDF document text
    • http://price-list.moscow/texesokfcza.pdfIn PDF document text
    • http://espacecmb.xyz/109686416397ca9h.pdfIn PDF document text
    • http://kernig.online/kakikinolivadovutimerifuxn3hn6.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/survival_bible_versekwui2.pdfIn PDF document text
    • https://marodesama.weebly.com/uploads/1/3/5/3/135349202/c89402730.pdfIn PDF document text
    • http://blablablacar.online/60433111336ga4x7.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/3hjnjb8/65404136297.pdfIn PDF document text
    • https://lefexaro.weebly.com/uploads/1/3/5/3/135324439/9ed63262d.pdfIn PDF document text
    • http://azakalaza3.xyz/jaxurudejegitovisgdqw.pdfIn PDF document text
    • http://findssldz.xyz/3d_flip_clock_weather_ad-_freen5e7c.pdfIn PDF document text
    • http://avtoshtorki.shop/lajisilingxi89.pdfIn PDF document text
    • http://goloszauniver.fun/zovizut61zv.pdfIn PDF document text
    • http://nemafivuduwidob.iblogger.org/44064329364.pdfIn PDF document text
    • https://cdn.sqhk.co/luginuwi/e316IUP/21377828612.pdfIn PDF document text
    • https://muluxadi.weebly.com/uploads/1/3/1/4/131453645/b59c3.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
    • https://s3.amazonaws.com/potamotaz/fusionner_plusieurs_avec_adobe_reader.pdfIn PDF document text
    • http://laxolivavaru.epizy.com/lopinemopovopupifedujapiw.pdfIn PDF document text
    • http://gusozafameximi.epizy.com/snow_white_with_the_red_hair_obi_voice_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/10967558693.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/characteristics_of_discontinuous_piecewise_functions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/4978481486.pdfIn PDF document text
    • http://mesapobifutu.rf.gd/74118252420.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/samsung_s4_mini_flip_case.pdfIn PDF document text
    • http://nofalowi.rf.gd/69975994636.pdfIn 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_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 4688 bytes
SHA-256: 62ac9047dee9dda28a7b84de192e1275ef0a950f19a1d46705bb0a8cfac5d23f
font_01_sfnt_off00010189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10189 11364 bytes
SHA-256: 81ae01675282655b4261eb07bf96f8a8cb44c1858891e4a6ac0b0f17f59aa025
font_02_sfnt_off0001276d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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