Malicious PDF — malware analysis report

Static analysis result for SHA-256 887e10900f069290…

MALICIOUS

PDF

79.0 KB Created: 2021-05-21 18:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e3e469e587273b011a0912ea843a7ac6 SHA-1: d94d08979700776aef0bc74082a064fc7b5314ba SHA-256: 887e10900f06929068026b0b86cffa09ca97cd2ecbe67f9b525cd79a335be700
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 0.9993

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://fokemale.ru/strik?utm_term=adams+township+cambria+county+pa+police+log PDF link annotation
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/7935122.pdfIn PDF document text
    • https://ruxuxosiforedop.weebly.com/uploads/1/3/4/4/134491380/3615437.pdfIn PDF document text
    • https://firebawoba.weebly.com/uploads/1/3/4/6/134659507/vevudejogotovevaxolo.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/dututogabotat_zileme_jexufezem_fivuzonam.pdfIn PDF document text
    • https://tisegibak.weebly.com/uploads/1/3/1/3/131380339/f8e8ac5a2e.pdfIn PDF document text
    • https://migerele.weebly.com/uploads/1/3/1/4/131453560/noforumu.pdfIn PDF document text
    • https://romidanunopupef.weebly.com/uploads/1/3/1/1/131163616/ripovis-xezuzujozol-dutirova.pdfIn PDF document text
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/7eb86.pdfIn PDF document text
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/7893165.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/wezukep/kaposi_varicelliform_eruption_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/anjagala_by_maro_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/koxopaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/5462868289.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/apgar_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/bad_girl_picture.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/c_oops_interview_questions_for_experienced_professionals.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/riroje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a9cead-4616-412e-92e3-a1f344b6bd8e/improvisation_for_the_theater_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/bisemipifanesanisabine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/838dde9c-32a6-47b6-aba7-deaa22d9f4c6/writing_meaning_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/sopuzeliditug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42ea6f7-c463-4b96-b0de-6f0495d6d046/singer_20u_zig_zag_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/nebariwudesilufido.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/descubre_1_leccion_3_answers.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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 5808 bytes
SHA-256: a28316e78cea560c5d78c97c2d07f485c9631c2ab8f6b6c37e4dc50266f1a634
font_01_sfnt_off0001083b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083B 11148 bytes
SHA-256: b0b4cb82f5352d9f834a8fa7cf50ee39145f9624128d8e61c73ea23a1a98bf81

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