Malicious PDF — malware analysis report

Static analysis result for SHA-256 091c0a080a0f4fb2…

MALICIOUS

PDF

76.1 KB Created: 2021-03-16 22:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3d383fe0211b1b97e953da7bea2de074 SHA-1: 40c439330cfef64c08e61bde236eee6144b857a3 SHA-256: 091c0a080a0f4fb2938f33ca01caede68280fb26cf642b673b993c215d2f56c0
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains keywords related to 'apk hackeada de clash royale', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/wix?keyword=apk+hackeada+de+clash+royale PDF link annotation
    • http://copyrightsupporteds.com/32379801624o0aus.pdfIn PDF document text
    • http://hardcreditcheck.info/misudafapokigun8hj3a.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/app_para_aprender_ingls_gratis_sin_internet.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/9032215050.pdfIn PDF document text
    • http://spainwow.pro/free_credit_score_report_once_a_yearannre.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/fhfgYif/9031010893.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/jhbdjfj/party_city_promo_code_honey.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/haANAgj/princess_and_the_frog_2020.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/60945372996.pdfIn PDF document text
    • http://kefets.xyz/xivaxipezixojedazosegek36jrq.pdfIn PDF document text
    • http://indir-kazan.com/jafip6zs0f.pdfIn PDF document text
    • http://canonsburglake.com/pebopatefawojom3b57.pdfIn PDF document text
    • http://ibkreactiva2020.com/74748120143w7yuh.pdfIn PDF document text
    • http://rivalo130.com/microlife_blood_pressure_monitor_bp3gy1-2noa38q.pdfIn PDF document text
    • http://videohost.space/karnataka_election_live_reportkwec1.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/egcihgh/bucketlist_bombshells_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/Njegfdl/42893546871.pdfIn PDF document text
    • http://216tilford.com/beyond_enemy_lines_2_reviewudgfx.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/gjxjjig/assistant_manager_salary_per_hour.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_594238f235354782bf19012ef125d566.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_dc4b13e14b384cb79fd87ec51c2064cd.pdf?index=trueIn 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_off0000ef4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4A 5316 bytes
SHA-256: d34ee5efd6d61e74ac5d051a09377bbed3cdb7cfbdde6c16772268654ca387c8
font_01_sfnt_off0001015e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015E 10140 bytes
SHA-256: bd1ddb888fe935e2cc48e233b2dc73c863e8a940ca0f404f28276e4ea1cd36f0

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