Malicious PDF — malware analysis report

Static analysis result for SHA-256 19018036bf5b069e…

MALICIOUS

PDF

64.5 KB Created: 2020-11-13 18:46:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b823ac560a2e80a506f6689340cf1f7d SHA-1: 130996e2fe7da3c05eb9d14f90d35a98ec79da39 SHA-256: 19018036bf5b069e9f17358f042c4f8d76e0a0fa591aa945f37ec533a99d55d6
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-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://traffine.ru/strik?utm_term=t+post+driver+tractor+attachment PDF link annotation
    • https://baxinumep.weebly.com/uploads/1/3/4/3/134366260/47222fac82b24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5f9dc42b615d3.pdfIn PDF document text
    • https://mijigudi.weebly.com/uploads/1/3/4/3/134352865/wuzom-viwulu-rejisemu-rapovili.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/rixevozajixezos/january_2019_calendar_kalnirnay_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/xiletiparabowasi.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/tratamiento_de_alopecia_areata_en_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/93261645699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa9bcb1-6add-4d9a-840e-c99f177ff805/fuguwoxejukodemikelakifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc71b3dc-5655-4a47-acfd-5a4a9b4702e8/zizufalo.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/89885365504.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/ambari_kannada_movie_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/caprari_pumps_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/zodakaxik.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/sleigh_ride_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/61534758144.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_off0000beb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB5 5288 bytes
SHA-256: 7f0c91710f9b4ce531eb7c6a00fc98ea12a988d6e2118c75b44161de6547a717
font_01_sfnt_off0000d08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08A 10760 bytes
SHA-256: 0026215a292563e837ba0e49f3f69723739416d0eadb571a38529c51af023702

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