Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79c86a7d948fc51…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 15:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 15eb725116b52760e2126862530af513 SHA-1: 2136edc50b45d0d80e3d1a211fae6a181cb86b92 SHA-256: e79c86a7d948fc51dfa19e92f7ec41306e294b5d58fb4c8cfddde1b5cccda410
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wix?keyword=gta+liberty+city+apk+download+android PDF link annotation
    • http://figebofisekozoj.22web.org/cervical_cancer_screening_guidelines_2018.pdfIn PDF document text
    • http://small-italy.space/livro_rapido_e_devagar_emg226b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_5fe9022b27bbe.pdfIn PDF document text
    • http://tevfikyuce.xyz/xolokogikoguliretozoj5ehdb.pdfIn PDF document text
    • https://tewonubipudi.weebly.com/uploads/1/3/6/0/136016370/2909727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_600ebc212794f.pdfIn PDF document text
    • https://zurejekivob.weebly.com/uploads/1/3/0/8/130813755/wenemalojo_lodojijudak_mabesup.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/6705495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojotefeva.rf.gd/dulido.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/xutosamorefikujupenaraxo.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/94939793952.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/78579149435.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/jivevomekokarodijubenib.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/dujogolokijodifuxijekos.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/88201677750.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/44709232322.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/a._d._h._d_kendrick_lamar.pdfIn PDF document text
    • http://zawozunilutufu.rf.gd/kopogojafogejigasejimo.pdfIn PDF document text
    • http://pasudef.rf.gd/barcelona_metro_map_app_android.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_off0000da5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5D 5320 bytes
SHA-256: c5c54afa754e725eb017957661a239dc40eaf0d0118dc38d06ed5693361e8a2e
font_01_sfnt_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 10480 bytes
SHA-256: a364c90ddb1c5848d015a9709dbd8e1fadb5110d146cbb5c5dcff5c442cb684c

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