Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c43f28e66ae190…

MALICIOUS

PDF

115.2 KB Created: 2021-04-01 22:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c19676b601260a9bd27ea07c012eb064 SHA-1: a655c9d1557458a6f27a83eb73b51facb16d2669 SHA-256: 11c43f28e66ae190e372a436993edaa88e96d39f5b2452e89b9271dab55f7f81
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one pointing to 'http://onenature.space/how_to_heal_from_child_traumareatv.pdf'. The embedded URL 'https://baarspo.ru/aws?utm_term=twilight+trilogy+in+order' further supports the malicious intent. The document body contains garbled text, suggesting it's not intended for direct user interaction but rather to facilitate the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://baarspo.ru/aws?utm_term=twilight+trilogy+in+order PDF link annotation
    • http://onenature.space/how_to_heal_from_child_traumareatv.pdfIn PDF document text
    • http://vclean-sale.shop/linksys_extender_re1000_setup_without_cd439s2.pdfIn PDF document text
    • http://clipshd.design/fafepanupujasidezapoqjb8f.pdfIn PDF document text
    • https://lenumerizak.weebly.com/uploads/1/3/5/9/135962539/migusute-madifu-lipulogukiw.pdfIn PDF document text
    • https://suzipokenefuju.weebly.com/uploads/1/3/3/9/133997801/f93316.pdfIn PDF document text
    • http://tixshopclub.space/kudoweybfyq.pdfIn PDF document text
    • https://gasagadivegolix.weebly.com/uploads/1/3/4/4/134488570/3030abd1a.pdfIn PDF document text
    • http://salonhq.xyz/lejawifavebipilolajolabaf04rjh.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/6612509.pdfIn PDF document text
    • http://skidki-day.store/99198449642i7vaa.pdfIn PDF document text
    • https://sotevujek.weebly.com/uploads/1/3/4/0/134012487/5439341.pdfIn PDF document text
    • http://afracheat6.xyz/1997_starcraft_pop_up_camper_manualp2vkp.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/tesasubawalozan/best_cheque_printing_software_free.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_07c2cfc6cb6f4eb794efd3a69e470fcf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/xevuzugawep.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_30e18a9691084b24a358c99d339cef9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/wegibogaxovifisotebux.pdfIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_dcc053d074e247f081d27c4c56b215c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/attack_on_titan_season_4_release_date_netflix_singapore.pdfIn PDF document text
    • https://8b62b971-d575-4461-ae89-9de7a2afac08.filesusr.com/ugd/c5a911_256784c34c4140479408ceba86962bb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nabifovu/nyt_2019_holiday_gift_guide.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_64434b1145e549ca94cce895b47f50e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/86728992294.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/weather_report_simple_definition.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_off000185d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185D4 4840 bytes
SHA-256: 0dab213f48aefc60b444b700d4171a8bdd3fc87819ac689fb297b20b46299a81
font_01_sfnt_off00019656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19656 12036 bytes
SHA-256: 5cc886873f9d67af23399c5b2289dfaf8471ab3575ce0e398d55895fea2b7729

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