Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f06140aa2badc0…

MALICIOUS

PDF

75.0 KB Created: 2021-06-01 03:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8e74af2420a979b0606475adf0181600 SHA-1: ad0c2a6c06b67d1e75fa4a881bebf39d8d66ebc5 SHA-256: e5f06140aa2badc0382eb85e716b632912471752f30f4dec5ac36897de662db1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to drive traffic. The primary lure appears to be related to downloading Netflix movies, suggesting a phishing or malware distribution attempt. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF being detected as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/pbw?utm_term=can+i+download+netflix+movies+on+my+chromebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473622/normal_6032c0e7c0cb7.pdfIn PDF document text
    • https://javowutimor.weebly.com/uploads/1/3/4/0/134016661/fopazeruwevakisirigi.pdfIn PDF document text
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/1685074.pdfIn PDF document text
    • https://mewodufupojapoz.weebly.com/uploads/1/3/1/8/131857890/noporogilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503387/normal_6014038a931dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144432831/8_ball_pool_unlimited_guideline_tool_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2460c075-6ac6-47b6-b04a-c55869d53aa9/15542255403.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144437016/18262870266.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/temadewepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce8bc34-d460-47a3-a5d4-4b381f519f4b/what_is_the_difference_between_a1c_and_blood_glucose.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/f/how_many_grams_is_6_cups_of_powdered_sugar.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/23923285402.pdfIn PDF document text
    • http://siwuromo.pbworks.com/w/file/fetch/144424731/61667316542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece7c720-1652-44b9-ac8d-00a2f534ebc2/vuwudusupadonaludazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d800f1b-7a9b-41da-aa08-2f9fff12fcfe/22067777447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6259feb-2866-4dec-b2c2-8eb92793b662/34856546544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5aa16ab-5312-43f4-8ab8-a327ca371478/the_miseducation_of_cameron_post_where_to_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/593e32a9-31b6-4587-b095-63e9c3551b6c/paxugovogaxevuvanisorenoz.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144411441/how_to_write_a_break_even_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b02f63a-f0fd-4223-93d6-c0148365d774/star_trek_beyond_sequel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6a298f-4139-409d-93cb-b6b48d2262ad/16559678910.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_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 5692 bytes
SHA-256: 81b4a8a6570cacf7d9f35550ebfa288b8ad612c01c17785e5aa0eac6f2dbe3ec
font_01_sfnt_off0000f8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C5 11108 bytes
SHA-256: d202eb92952f0ffbe271d143eb6615759b8ae33ad77a2a692b7999f79ca641a6