Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fab71008cf24a6…

MALICIOUS

PDF

78.0 KB Created: 2021-03-24 20:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 29b62bc0ffcc08f296e7ccfe7ae247e4 SHA-1: 93b5337e98d181956605f252f4c95e0bbf1a3156 SHA-256: 48fab71008cf24a6e605bbdec9b9ecda80d08f970f3c95f47cf15fd8a1b44c47
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://golowaki.ru/award?keyword=d+d+3.+5+monk+character+sheet+pdf PDF link annotation
    • https://cdn.sqhk.co/dufubimaru/IVpjaxj/name_the_eight_planets_in_order.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_60135c1b3de87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5ff60d71a97df.pdfIn PDF document text
    • http://jokegave.mywebcommunity.org/bio_data_format_for_job_download.pdfIn PDF document text
    • http://xitodefigatefuj.medianewsonline.com/how_to_write_3_body_paragraph_essay.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/xilitovomofir.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/BHXiJje/treatment_guidelines_for_immune_thrombocytopenia.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/gehegeX/drive_for_speed_simulator_apk_mod_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_5fd89ed416695.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/mojivikapeti/2550118396.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/sfg_2_apk_mod.pdfIn PDF document text
    • http://gizixaxeviduf.myartsonline.com/rubuvejimopa.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/63090392157.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/lekidanonudurexinorosudi.pdfIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_5cb6784415964d92b922fa3e7fd14a97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/movegizeforewiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/is_canon_mg5320_airprint_compatible.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/lovavo.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/kasisuwogazajefavize.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/flowers_images_wallpapers_free.pdfIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_c53b0b55a2f6456daa6698dae8e8b864.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_off0000f0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 5744 bytes
SHA-256: f08f2ea57be73191559680b5e2791932e0182b8177156622629353b340291cac
font_01_sfnt_off00010447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 10804 bytes
SHA-256: 1fb4fb77db6cc4590fc468ec70d94bff9f59675fae7a91df2ac672e1d5a6449c

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