Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed39cde2746b47b7…

MALICIOUS

PDF

80.6 KB Created: 2021-02-27 22:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5081228e9a49e6fef3ba750df6f106ef SHA-1: 42fd153fb8e8e2eeb1629bd2bd0ed8e6e0bae102 SHA-256: ed39cde2746b47b7a581d3182687f39bc9d0dd3557459f35e55a31f2def11cd9
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to search queries, further supporting the phishing pretext. The presence of multiple links on disposable hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/aws?utm_term=how+do+you+use+the+soap+dispenser+on+a+ryobi+pressure+washer In PDF document text
    • https://lomowurepiv.weebly.com/uploads/1/3/1/4/131437546/tiweno-tadupijiwafubil.pdfIn PDF document text
    • http://moreprodukti.com/nitro_pro_crack_bagas31bmnin.pdfIn PDF document text
    • https://besukobar.weebly.com/uploads/1/3/1/0/131069863/jatuworu.pdfIn PDF document text
    • http://getdouche.xyz/asp.net_mvc_dropdown_onchange_ajaxjw37o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377381/normal_5ff2e252ba42e.pdfIn PDF document text
    • https://noxigizafovezad.weebly.com/uploads/1/3/1/4/131438329/danerukeve.pdfIn PDF document text
    • http://spainsale.pro/becoming_a_supple_leopard_frds3xb.pdfIn PDF document text
    • http://asta-stroy.ru/nirikonesidafadesb6sm.pdfIn PDF document text
    • http://construt.site/ipad_mini_5_price_in_pakistan_256gbisyab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426418/normal_600b9e9625dfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_602166bd5388c.pdfIn PDF document text
    • http://lifeeuro.info/why_does_amazon_not_have_2_day_shippinghxnmj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugofabafomozo.epizy.com/what_is_the_best_exercise_for_over_40.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/pavowekukabanosurija.pdfIn PDF document text
    • http://kobaguwo.epizy.com/68456122958.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/animoto_video_maker_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/66074472471.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/troy_bilt_21_self_propelled_mower_belt.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/weather_report_jansenville.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_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 5308 bytes
SHA-256: 3a763a7ebdd4a1652533ee0a6fcb8af17e0a7bd9ad70750a762a0f190aec1565
font_01_sfnt_off000110f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 10428 bytes
SHA-256: fadc262c6ff428657d6af1352facfc841c18cd32a6088fad4b6fceeebc13d0f7

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