Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eaa4e434bfbdece…

MALICIOUS

PDF

80.1 KB Created: 2021-05-24 02:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 368fe4b7290dbaada6d8fcb552649a21 SHA-1: 55ac4ca06420340326b2b99a4f06fcb89097f418 SHA-256: 2eaa4e434bfbdece5105b790dc569af454103cd0dd375b203b09fe6270bf77a0
186 Risk Score

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 0.9991

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=can+i+change+72+dpi+to+300+dpi PDF link annotation
    • https://sazujusa.weebly.com/uploads/1/3/4/6/134632778/9750726.pdfIn PDF document text
    • https://jatufabafalili.weebly.com/uploads/1/3/1/6/131637938/9634537.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/8613788.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/pilebunatotaru-rikevitilu-dexodobeze.pdfIn PDF document text
    • https://rebijigubewu.weebly.com/uploads/1/3/4/7/134770847/rosirorugiwinis.pdfIn PDF document text
    • https://dodotutole.weebly.com/uploads/1/3/4/7/134764587/1124ffd4.pdfIn PDF document text
    • https://ronukava.weebly.com/uploads/1/3/4/8/134885886/9aa3ce83d59e2b2.pdfIn PDF document text
    • https://botapafejerevim.weebly.com/uploads/1/3/5/3/135317081/885d23f46de.pdfIn PDF document text
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/lomutupaxutokuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sugosubexez/ferrari_2020_preo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b6a6be-bd04-4274-8db1-2b3c81e1dedc/26954254242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4adf2a7d-0377-4744-8e20-05932b7dfe26/sokegizavogisipopirejufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e219030f-7e74-43b5-8c5a-9fba9ba7e868/21605494694.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/implosion_mod_apk_1._2._10.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/60807126063.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/27693423291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa0ad98-7d9b-45d9-bc1e-a0ce26c4e678/25193889875.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/buvuwikogazepitekawel.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/83546578507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470e2812-5719-4130-ab34-997ca41d00a6/62412828444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a5a037-6186-4fb6-8865-1d8109d56dfb/sat_subject_tests_cancelled_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c55b616-1843-4343-8549-d84f47354511/who_played_the_twin_sister_in_a_simple_favor.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/iphone_6_india_launch_date.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDC 5360 bytes
SHA-256: c1df493c0a91ab7bf2186e8515321231f2a293da00a9da456b1c614efdef5542
font_01_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 11140 bytes
SHA-256: 073e52f6db3ffae8da43fdcc3dae75dd3ebdb1e9bc6fac7edc55bd970dd61270
font_02_sfnt_off000124cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e