Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd202f6ec6be8217…

MALICIOUS

PDF

73.5 KB Created: 2021-02-20 18:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c08db8dbc755f112140128d1b268858d SHA-1: 3215cf22fb82a1142ef235cf6f6f326c68a4304a SHA-256: dd202f6ec6be8217787be2ff1a15095fb1f3e5d2a3768c563dd1bc363ad910ba
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text, suggesting it is not intended for human consumption but rather to host these malicious links.

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://yafferge.ru/strik?utm_term=cast+of+a+christmas+carol+1999+full+movie In PDF document text
    • http://mjawebdesign.net/django_submit_button_outside_form2n2og.pdfIn PDF document text
    • http://endi-itali.space/77466237609n59oi.pdfIn PDF document text
    • http://homebig.space/bexigiviputujesuviwozalij3gfir.pdfIn PDF document text
    • https://wanuzixa.weebly.com/uploads/1/3/1/4/131482886/2248922.pdfIn PDF document text
    • http://eurofamily.pro/color_changing_wallpaper_hd_downloadi6q8n.pdfIn PDF document text
    • http://realnoe-obshenie.online/banjara_songs_mp3_free_downloadsfc94.pdfIn PDF document text
    • https://tugagofinose.weebly.com/uploads/1/3/0/8/130874012/runin.pdfIn PDF document text
    • http://draiwenstore.online/direct_tax_amendments_for_may_20197l7bq.pdfIn PDF document text
    • http://fabermanufacture.ru/solurodp7c4b.pdfIn PDF document text
    • https://nujelojebalu.weebly.com/uploads/1/3/4/6/134690198/vuwatogiwevemusur.pdfIn PDF document text
    • http://citimart.online/arteriovenous_malformation_of_uterusidb9i.pdfIn PDF document text
    • http://realnoe-obshenie.online/how_to_turn_guided_access_on_ipad6xrpe.pdfIn PDF document text
    • https://vezudoki.weebly.com/uploads/1/3/4/3/134320633/baedd1.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/dCrjbia/zemopenisexelabaze.pdfIn PDF document text
    • https://cdn.sqhk.co/toxaxiked/WH284jg/water_tracks_racer_fast_speed_water_car_racers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/baburao_la_pakda_full_marathi_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/vulunad.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/chakra_healing_music.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_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 5296 bytes
SHA-256: afa879af6b0a49ba00366bcbe5cfa27149810ef72d8abe36187e84cccc03b8ef
font_01_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 10920 bytes
SHA-256: 8cdda3f79b1315a06748a14a6779611a7f9e22cc27a6af45a9aa691eed10b9ac

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