Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b78fb825303c8e…

MALICIOUS

PDF

78.1 KB Created: 2021-04-02 15:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d80d61524443b5075b04fe41d2bbab0a SHA-1: d86666f4388bf885362b6a8507c7c1e1efed85b8 SHA-256: 26b78fb825303c8e1acc610486baa5ad4a3e9eff536b5945348ee805f76633a3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or to host malicious content. The primary embedded URL, 'https://ponafet.ru/wix?keyword=free+microsoft+points+generator+xbox+one', indicates a lure for users seeking free game points, likely leading to a phishing or scam site. The ClamAV detection and ML classifier further support its malicious nature.

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://ponafet.ru/wix?keyword=free+microsoft+points+generator+xbox+one PDF link annotation
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/5149159.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/69824506006.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/wurugeru-sitavikusaxega.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/nakolamojumaw-vasod-xumuk-tulobutog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5fe0b1eb57f63.pdfIn PDF document text
    • https://bepefuligifeval.weebly.com/uploads/1/3/5/9/135981888/jitelegagowosima.pdfIn PDF document text
    • http://nakozek.mypressonline.com/71097646733.pdfIn PDF document text
    • https://zibataluguxomi.weebly.com/uploads/1/3/1/3/131382491/8664486.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/72573945161.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fcf42acd34e0.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/e0365340-0e8c-4edd-9441-125f41ee8469/zifalatopodamufax.pdfIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/interview_questions_for_english_teachers.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/15619408101.pdfIn PDF document text
    • http://bokawevetejap.atwebpages.com/adobe_scan_business_card_scanner_with_ocr_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971d61a8-f298-40cf-a043-6fea8ca69765/jesijisipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeadb84f-9fb2-4978-8ed2-2e8d93b02097/28418312733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498471a4-e710-4521-a88b-23bb1bedc9d7/fenaropukipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3804e58f-600d-4b94-844a-30e66420f229/girl_interrupted_movie_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb50b08a-7845-4662-9050-bb5ebecffea0/radio_flyer_movie_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34284b7-af4b-4645-830d-098dab9376d5/dds_discount_near_me_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9675291b-32e0-4a5f-911c-c9ee009fb92b/lekoso.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_off0000f124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 5468 bytes
SHA-256: f4fe69fbef0da4681cb2c33a24fd687d5cd4a23a9919b225971cea468fa6315f
font_01_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 11548 bytes
SHA-256: 97e9753d2cb5dce99086d8915d646ed47f21ce3dd495560050f23a665a690066