Malicious PDF — malware analysis report

Static analysis result for SHA-256 43912b30d08cd9c7…

MALICIOUS

PDF

103.7 KB Created: 2021-03-07 02:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 066bb012ea5b33dc5e78f0757d2ce028 SHA-1: 95be2b3b8d2c7888de7d7973d23bc8d5ed04fdba SHA-256: 43912b30d08cd9c7788bd84e48d6d4008fc3b65437e649a03e7378a0aff5e291
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to a game manual, directing users to external sites. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://seumenha.ru/wb?keyword=final%20fantasy%20tactics%20war%20of%20the%20lions%20manual%20pdf PDF link annotation
    • http://gejudoxe.mypressonline.com/mafuwimerezolovobuzi.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/pride_and_prejudice_free_download_full_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_6035294332d27.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/what_is_the_climax_of_prisoner_b-3087.pdfIn PDF document text
    • http://pululap.22web.org/tapawififiwok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fe45417a69ef.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/rogevudaguzapovomalutatiz.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/rinnai_boiler_error_code_12.pdfIn PDF document text
    • http://nugowimabu.mywebcommunity.org/gozabonodemetovefatabadog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zitasixan.atwebpages.com/beats_studio_wireless_headphones_manual.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/novuradoxirewefi.pdfIn PDF document text
    • http://wobadumiravolu.atwebpages.com/92600501741.pdfIn PDF document text
    • http://renoxefi.epizy.com/faxutonolesejuwagobuku.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/vanumexidef.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/jerobujeguwerizulap.pdfIn PDF document text
    • http://lapukup.epizy.com/curriculum_vitae_template_free.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/warlock_5e_subclasses.pdfIn PDF document text
    • http://wififeju.atwebpages.com/the_chaser_movie_quotes.pdfIn PDF document text
    • http://soveralenox.epizy.com/nujarajiditenewogewuvowup.pdfIn PDF document text
    • http://mijuguxugatuk.epizy.com/wilurefexafikusixabo.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/boy_scouts_of_america_lawsuit_phone_number.pdfIn PDF document text
    • http://zepenolewiri.epizy.com/gudotog.pdfIn PDF document text
    • http://sivigowukom.epizy.com/uc_browser_for_pc_windows_10_apk.pdfIn PDF document text
    • http://mogopubu.epizy.com/53955898378.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000120fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x120FD 11956 bytes
SHA-256: 220c86f906477467add06543810f7078e5325752f54263cfbd60054b2b07a7d6
font_01_sfnt_off00014899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14899 5424 bytes
SHA-256: ef394f8d45c5fd2e05b5f1228a802d63515bdd91b064faadab5d01cadfb8da7e
font_02_sfnt_off00015aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AEA 11632 bytes
SHA-256: d645b1e59d6000adaef4a3d237f579902832b824ec63d7edf6c32bd0222cd96b
font_03_sfnt_off00018217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18217 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71