Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb995c1a60811492…

MALICIOUS

PDF

71.8 KB Created: 2021-02-16 04:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0ed88668a51f49cf4442ad742441d1d6 SHA-1: 990c34c4d4c062ef5ded3b098b613ef75b46f369 SHA-256: bb995c1a60811492d560003162fd682595a5fbfda99f4ab5405474049bd05bd4
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs pointing to suspicious domains, some of which are flagged as link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, potentially leveraging client-side exploits or social engineering.

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
  • 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://bologen.ru/wix?keyword=read+the+wide+window+online+free PDF link annotation
    • http://bofesota.66ghz.com/account_manager_resume_format.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/magejuligukelesukimkai4.pdfIn PDF document text
    • http://bubble1.space/data_structures_in_c9vh6k.pdfIn PDF document text
    • http://flathead.us/wopurisipebigizajik6muwg.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/wlhhY2K/82441842439.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/VQfQpTL/restaurant_paradise_sim_builder_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xinovupu/hiiTbSR/digital_fitness_assessment.pdfIn PDF document text
    • http://malespw.xyz/spotify_playlist_sd_cardpjc8k.pdfIn PDF document text
    • http://rubyshup.space/4406319233869jn9.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/VjiI7Ns/jumaw.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/diggclV/tabexafarajag.pdfIn PDF document text
    • http://creditactive.info/copy_paper_a4_80gsm_white_500_sheetsj9ukp.pdfIn PDF document text
    • http://jazulivorif.iblogger.org/calendario_liturgico_2018_argentina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebulibupa.rf.gd/vigazexu.pdfIn PDF document text
    • http://merawaboz.epizy.com/identifying_nouns_verbs_adjectives_and_adverbs_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/tegixusigogexarameku.pdfIn PDF document text
    • http://wanedinak.epizy.com/pharmaceutical_biochemistry_book.pdfIn PDF document text
    • http://lafeseg.rf.gd/29621495747.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_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 4916 bytes
SHA-256: d6cfadf45203cdc639dd3aac1f1bd627e75a3b5d7dfccf1db8498e638281d939
font_01_sfnt_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 10428 bytes
SHA-256: 065293ba2fd137af78644b3b7680ddbd348aea68eccbd20e41828e04fdc9755f

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