Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5aa24be26f6fcb…

MALICIOUS

PDF

80.6 KB Created: 2021-02-17 16:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8be1b76610bd7debe9b2c62062fa1f62 SHA-1: 9f118d28f643e92f59fbc15115d65388c27397a6 SHA-256: da5aa24be26f6fcbc4898c3b6952216ebec68e9f1a5051844054f32092803c8e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious and contains a large number of embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to scanning photos from a printer. The primary attack pattern involves directing users to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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.
  • 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://crophysi.ru/strik?utm_term=how+to+scan+photo+from+printer+to+computer In PDF document text
    • http://pihodze.com/65551656690hayhu.pdfIn PDF document text
    • http://ryursew.space/planned_parenthood_abortions_performed_2016vppja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fe097d38b667.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/PhjEhgK/43494290558.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/ajjfhbx/disco_zoom_background.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5fe81e64aa7a3.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/1ef031b.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/8245978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459182/normal_5ff08092acd1b.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/4SLiaPg/69901310990.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/ijibhdk/firinuforafuwibive.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/nZFahei/zigzagoon_pokemon_x.pdfIn PDF document text
    • http://youla-24.cc/wallpaper_kartun_lucu_untuk_android3c2l1.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/jjbeBib/480833127.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/d2tJwLd/nitro_rc_cars_for_sale_cheap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5ff026870cc0c.pdfIn PDF document text
    • http://tamakar.tech/bujepiluwusitagixozuri5kelt.pdfIn PDF document text
    • https://cdn.sqhk.co/zonelatu/hhhjohi/nick_jonas_kingdom_netflix_cast.pdfIn PDF document text
    • http://paypallsecurity.com/school_love_album_video_song_tamil4opxf.pdfIn PDF document text
    • https://likukekubusaz.weebly.com/uploads/1/3/1/4/131408788/juvegit-fevozajedew-badimefatu.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/wamatasamegu/avatar_korra_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/brain_teasers_questions_and_answers_for_adults.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_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 5276 bytes
SHA-256: 5a592c995563c818a9ed927545c11a17ea385002ab255fc45e097737f2b14f6f
font_01_sfnt_off000110a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 10684 bytes
SHA-256: 368c7e6c2fe02287b2a1640cb47ed46aa2d3179f9e36c7130233873b545ea017