Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c7b7b70058d729…

MALICIOUS

PDF

82.2 KB Created: 2021-03-19 04:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7c649fdcf49888bfa2263bc729a9f92d SHA-1: 51e8a7a2689099bef14f7ae03d52daa8a0ca34b6 SHA-256: f0c7b7b70058d729dea5a6bd9ea21c7ae5053459ebde28d05efe37103669620e
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=editable+4+generation+family+tree+template PDF link annotation
    • http://wufusigemaxegok.iblogger.org/45090303112.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/bamegizasilusag.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/sifadoxivij.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/3028943.pdfIn PDF document text
    • http://nuxaxupijejuz.iblogger.org/rarenofezogurebemibi.pdfIn PDF document text
    • https://pusotovoxidelo.weebly.com/uploads/1/3/1/6/131637553/tesezimesutuveju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483610/normal_60001f5927797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_6026c05a15d5d.pdfIn PDF document text
    • https://mapatujil.weebly.com/uploads/1/3/1/4/131454051/cb2f1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5fce057a228ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369763/normal_5fcb039848c3b.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/bitumomelufezigi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479923/normal_5ff9f79e4a783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katetagozu.epizy.com/queen_platform_bed_woodworking_plans.pdfIn PDF document text
    • https://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_fee9bf2a4fa849268637fdf069786394.pdf?index=trueIn PDF document text
    • http://wevopik.rf.gd/59582338740.pdfIn PDF document text
    • https://486a928f-df87-4682-b39c-9199637d78f9.filesusr.com/ugd/982a49_466c5b1ff38b41ba81a9992c6b331307.pdf?index=trueIn PDF document text
    • http://jabejanaboz.atwebpages.com/what_is_a_good_word_that_starts_with_e.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/pofexu.pdfIn PDF document text
    • http://senumodad.rf.gd/english_book_class_10_cbse.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5468 bytes
SHA-256: e45fb3830beddc67c3db84677bf5ce4326bfc8c8f5b348b13c66934c6d0f81ac
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 3344 bytes
SHA-256: 1eebe74797ed44c7c8fbbc5139878e07554a5f788b4121865ae0519bb291554c
font_02_sfnt_off000110c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 12728 bytes
SHA-256: bc1a3ff46c143ff222dcbd4da6c1d7f33d8c0d8835e2c2749b657c107012f69d