Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a46241b31b1bf7f…

MALICIOUS

PDF

69.2 KB Created: 2021-03-07 09:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e2df2c8690e0bfea02a705546514f437 SHA-1: 51412f3211708c0675f61ba6837e05aeed18556c SHA-256: 4a46241b31b1bf7fc74aee1534ed3488e3bfd28a0d5aaac8c73bc263f94314af
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, with one pointing to 'resalured.ru', suggesting a phishing or malicious content distribution attempt. The presence of embedded JavaScript, though not explicitly detailed, is a common vector for exploiting PDF vulnerabilities or delivering further malicious content.

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://resalured.ru/wix?keyword=carencro+middle+school+lunch+menu PDF link annotation
    • http://tifoxikutawe.sportsontheweb.net/yamaha_rx-a730_receiver.pdfIn PDF document text
    • http://wotedogupowu.sportsontheweb.net/dufaki.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/apply_proguard_android_studio398yw.pdfIn PDF document text
    • http://servempieza.site/stress_management_techniques_for_studentstq5g5.pdfIn PDF document text
    • http://sakhavto.ru/blood_type_diet_for_b_positive_food_lista23qh.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/principles_of_electronic_communication_systems_ppt_chapter_7.pdfIn PDF document text
    • http://craftsmansmetics.com/call_block_app_for_android_freealsn3.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/how_to_simplify_a_ratio.pdfIn PDF document text
    • http://instasale.company/71526273546cwv1p.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/wolawatin/74471185144.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/96811133546.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/nededov.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/the_hound_of_baskerville_sherlock_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/animation_wallpaper_for_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/gapiwonuresanalazazatuj.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_fa11610664cf4dd292e0b00af29be94c.pdf?index=trueIn PDF document text
    • http://vubelifijam.atwebpages.com/how_to_make_a_claim_on_usps_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/18994458753.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/peridarire.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/battle_net_launcher_64_bit.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_3ab31d95044b4e9bbc1558d1c73e2301.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_a6d3aa2d51d243d496d833a19a9ced85.pdf?index=trueIn 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_off0000d31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31A 5084 bytes
SHA-256: 51145d8fb0788c82b2425c8f87bb9064d95824d470d72b23e5e055b649eb709f
font_01_sfnt_off0000e42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42E 10232 bytes
SHA-256: c55571125c08e2037f090ffe4a7de40e5b93e3a11d0ecee67bc927344ae53266

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