Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e9754fa870fb58…

MALICIOUS

PDF

73.7 KB Created: 2021-06-06 03:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 292153bd46ba34b9bf103f00ff55735d SHA-1: 285b4e85eb8718af8a487a22b1e5fb8e41b1ecb6 SHA-256: f9e9754fa870fb58b3deddfb6359fe2a5793bed04494e891a1511ef8bb6e4bdd
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, including one that appears to be a phishing lure for movie downloads. The presence of many external links and the use of disposable hosting suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://irlanc.ru/pbw?utm_term=dev+tamil+movie+free+download+isaimini PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464862/normal_5fde9fcbdcee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_602c528ebd6b8.pdfIn PDF document text
    • https://xudixakutax.weebly.com/uploads/1/3/0/7/130776611/8482639.pdfIn PDF document text
    • https://pamenusunawot.weebly.com/uploads/1/3/4/0/134041165/rigebezofale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5fc752b73cfe0.pdfIn PDF document text
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/63be0d552fbda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb6922d-7ab8-4e35-920a-ea85459ede17/burger_king_android_app_uk.pdfIn PDF document text
    • http://xutosop.pbworks.com/f/watch_dragon_ball_super_broly_english_dub_reddit.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/99654762144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e27e00-fa4d-4185-91b7-eef7845b1191/40624361621.pdfIn PDF document text
    • http://gemometis.pbworks.com/w/file/fetch/144513468/icloud_unlock_software_free_download_for_pc_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/535a05d6-c9a2-4961-af33-edfbc2f30c40/how_to_make_cookies_on_pizza_pizzazz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0af59de-3c87-40e8-ba93-22aeec8d50e5/horse_rug_temperature_guide_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73a7e50-965a-4593-9c55-d8ab0a039fb8/puketujofavurewozeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1c6209-7ec0-452b-8a7f-e1cb2b17c100/furuxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a98522-2fbf-4313-a6cb-4bcb24d4caa8/87205741214.pdfIn PDF document text
    • http://labidan.pbworks.com/w/file/fetch/144571731/why_is_my_internet_not_working_on_my_assurance_wireless_phone.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/how_to_pair_tzumi_probuds.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_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 5204 bytes
SHA-256: 6ba848bb0a29bc61bce67ea4c7758b7438f17dcaaf95a05faf27939778b08a72
font_01_sfnt_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 10528 bytes
SHA-256: c98d9f10ce74e74cb4fb4977913da3c9a9e9943b753cb56293cb8598745a5831