Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e090a7da4a44c6…

MALICIOUS

PDF

74.5 KB Created: 2021-02-12 03:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 99f235ad808bfdfb4af427db5332f597 SHA-1: 3ffaf7f341a965412b235c7eea0d43909a9860ac SHA-256: 42e090a7da4a44c6be44013514451f06e59f041fddce27228092280badd3dbe1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one prominent URL related to 'pokemon moon 3ds emulator'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of using many links on disposable hosting, suggesting an attempt to distribute malware or conduct phishing. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious lure.

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://seumenha.ru/wb?keyword=pokemon%20moon%203ds%20emulator PDF link annotation
    • http://cparta.moscow/hechos_y_opinionesal7kg.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/icDbCrO/smashburger_near_me_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/buzosefif/Djajcgj/lonerism_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/aYbDe5S/54760876138.pdfIn PDF document text
    • http://sifulodidikit.22web.org/raabta_piano_notes_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/guzamuvi/IxsbjfF/assistant_dental_school.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/7pigidC/67682975858.pdfIn PDF document text
    • http://natlegend.space/download_m64plus_fz_pro_emulator_apk28eh4.pdfIn PDF document text
    • http://kizijele.iblogger.org/94772275198.pdfIn PDF document text
    • http://topdiscount.pro/sone_sone_akhara_songqv4it.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/hjShi4h/womirobekux.pdfIn PDF document text
    • http://vigastlens.xyz/77469439715pn8q3.pdfIn PDF document text
    • http://ses-paypal.com/46755255367vgvzf.pdfIn PDF document text
    • http://gelchlen.fun/11275122222o5o1p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radagosedapisat.epizy.com/refebikaluduxotuxowa.pdfIn PDF document text
    • http://gekikebikujog.rf.gd/black_friday_full_movie_free_480p.pdfIn PDF document text
    • http://wowemipawugese.epizy.com/gabikeb.pdfIn PDF document text
    • http://fitewuvo.rf.gd/26087006010.pdfIn PDF document text
    • http://lurilufe.epizy.com/dazobafepomolux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B1 4744 bytes
SHA-256: cc76a3ca29f67b103bb7beb7acd8bd21fcfc6997a39c5172f44bf2064998940c
font_01_sfnt_off0000e54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 5200 bytes
SHA-256: 847a070095d9d75ae4884302f8cb2e52534f996f660d713e6b1bb491bfb980be
font_02_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 11280 bytes
SHA-256: 87945d6ca3cf058c6b4224ff1b6061bcae7c9f4e2a06f60ab52de503f855947b

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