Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f76c71244e3dfe9…

MALICIOUS

PDF

82.4 KB Created: 2021-03-30 20:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dadb9e36a86681cf800b11f52408732f SHA-1: 9bbad3b61fd4f71e3a9eb5b9e24291c54814d1ed SHA-256: 8f76c71244e3dfe95f01be763a9aaa61abe02956c3ef5af5f4470ab0f9d777e3
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/award?keyword=makalah+bioremediasi+pdf PDF link annotation
    • https://cdn.sqhk.co/bepemuno/jivhdnF/mimanilifusenazesatawowaj.pdfIn PDF document text
    • http://fanexaxujuto.22web.org/84085158968.pdfIn PDF document text
    • http://metikinave.22web.org/estatuto_anticorrupcin_colombia.pdfIn PDF document text
    • http://copalofa.site/8013301356ir1pi.pdfIn PDF document text
    • http://dostafood.xyz/71748048544b3rd1.pdfIn PDF document text
    • https://cdn.sqhk.co/moxelutedoje/h81gdSy/legends_bar_and_grill_lighthouse_point.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/jinjhfe/dynasty_warriors_4_wu_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/zujadibarise/FhdylqA/neogeo_pocket_rom_pack.pdfIn PDF document text
    • https://cdn.sqhk.co/vugasoveg/hfgcQhg/86666132024.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/hbmhhT5/zijeje.pdfIn PDF document text
    • https://cdn.sqhk.co/rejiwosujupa/300yrwY/business_indonesia_singapore_association.pdfIn PDF document text
    • https://cdn.sqhk.co/foguwugafu/ajaie5u/bcbsil_claim_reconsideration_form.pdfIn PDF document text
    • http://beliyden.xyz/how_much_is_baby_grand_piano_worthxp2eb.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/ggeLjg2/real_3d_racing_games.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/fewunadupop/devi_kavach_lyrics_in_sanskrit.pdfIn PDF document text
    • http://tajisogekumobuk.epizy.com/echo_electric_chainsaw_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/4097712026.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/zizupunolesoba.pdfIn PDF document text
    • http://wivufakumetewiv.rf.gd/mastering_the_art_of_french_cooking.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/puzesazazadosenoweloba.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/akilandakodi_brahmanda_nayagan_full_movie_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/zokakotomi.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/is_medium_density_fibreboard_strong.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/khasab_port_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/69697906581.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 5488 bytes
SHA-256: 38160229b0918cd29da5864ad12fb37cf5ac229c42dd69c1c29d764390839d45
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 10344 bytes
SHA-256: 448bd91a50b46bcfd3f0ce813a0ab2796b345b062e8079dfaa5e0ade65d12a4b
font_02_sfnt_off000126d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 16136 bytes
SHA-256: 2df60db25c4006ebf5ce7f30ca7461b7931ff48239c1caafece913cf4cb3b6f2