Malicious PDF — malware analysis report

Static analysis result for SHA-256 9391367b6fc8122f…

MALICIOUS

PDF

79.0 KB Created: 2021-04-03 04:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c677fb3776835930ff8b3aebc9dcf53d SHA-1: c2a157d4c0f21ab92098ae47682525ac556dc888 SHA-256: 9391367b6fc8122f65853b2c127f5778cd0e7cce3a998bae8c04b94e534941da
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 0.9998

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 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://dugedepap.ru/award?keyword=exercise+mathematics+form+2+pdf PDF link annotation
    • https://xosipepimebat.weebly.com/uploads/1/3/2/6/132682768/fujudavunexop.pdfIn PDF document text
    • https://xovesoxak.weebly.com/uploads/1/3/0/8/130813458/6845285.pdfIn PDF document text
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/rabokir.pdfIn PDF document text
    • https://jowapiwinutakun.weebly.com/uploads/1/3/4/3/134365581/jogalolaxal-zufikefukizo-jexujal.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/6054713.pdfIn PDF document text
    • http://larekew.mywebcommunity.org/shanghai_subway_map_english.pdfIn PDF document text
    • https://fadexawotizetav.weebly.com/uploads/1/3/4/3/134339615/392a28087b7981.pdfIn PDF document text
    • https://dukezowe.weebly.com/uploads/1/3/4/6/134602160/rizekolifebumefifadi.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/protein_calorie_malnutrition.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/1245013.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/alguien_esta_mintiendo_gratis.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/bugutaj/traits_of_transformational_leadership.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/cherry_tree_poem_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64d1845-a11e-432a-b6e2-45481a09a9e0/hard_reset_kindle_fire_3rd_generation.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/tagutajigijezofed.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/ford_mustang_mach_e_gt_performance_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/cazadores_de_sombras_renacimiento_3.pdfIn PDF document text
    • http://gagugitebuf.atwebpages.com/epidemiologi_cacar_air.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/xixebinisapitepoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b14fe97-fbcb-44d7-b795-7ed1ded264ee/vulofavezerugedebujotimaw.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 6588 bytes
SHA-256: f96a37943038e1b553710b28e1646bcf352d8bd51afd4ffe49ba7f080766b775
font_01_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 5520 bytes
SHA-256: e80ff1a8f8e1cacfefed778b7b2f8afc1514b9af13fb9c0f05095a2d1dd11dda
font_02_sfnt_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 10984 bytes
SHA-256: c9f1198f9d4a936fad267ea2c15a9a3b673d137e0074ac7036b79a46913a3e26

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