Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b0b0e716a3863d…

MALICIOUS

PDF

79.5 KB Created: 2021-02-24 20:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ea8f45cc9ca4252181d79992b464774b SHA-1: b063df401154c607abedee75e45bc3942f4b58e5 SHA-256: 38b0b0e716a3863d2fd49c2efab52dde37c5b82e93399c30b5704d0855a45edf
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains keywords related to 'Clash of Clans' and 'wkhtmltopdf', indicating a lure to external content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jottigo.ru/wix?keyword=clash+of+clans+strategy PDF link annotation
    • https://tazerodine.weebly.com/uploads/1/3/4/5/134598813/b7335.pdfIn PDF document text
    • http://soul-felt.com/instagram_photo_downloader_for_iphonenat87.pdfIn PDF document text
    • http://naderuromopuru.22web.org/tnpsc_answer_key_2019_group_4_tamil.pdfIn PDF document text
    • http://b0xberry.online/sepexupotoraxukgl9hv.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/f032c9a1a.pdfIn PDF document text
    • http://robot3.site/tajibixagazusiguvozr1o2.pdfIn PDF document text
    • https://bokirises.weebly.com/uploads/1/3/1/6/131607331/a10476d5dca802d.pdfIn PDF document text
    • https://kixixowagixu.weebly.com/uploads/1/3/2/7/132710794/8152511.pdfIn PDF document text
    • https://vojubewerele.weebly.com/uploads/1/3/4/0/134013512/wawizefoped-zatut-pokopexasurem-domazemepokev.pdfIn PDF document text
    • https://guladusive.weebly.com/uploads/1/3/0/9/130969442/3640997.pdfIn PDF document text
    • https://fodukajanewirom.weebly.com/uploads/1/3/5/3/135383911/81402bec0bd.pdfIn PDF document text
    • https://rapokivagifo.weebly.com/uploads/1/3/4/3/134338569/jatukegedo.pdfIn PDF document text
    • http://ylyn.ru/61426143192cpl37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://posufimiru.rf.gd/34994703412.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/62374617915.pdfIn PDF document text
    • http://repenebaroregom.rf.gd/cant_access_air_force_portal_from_home.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/wwe_crown_jewel_grades_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/tirelim.pdfIn PDF document text
    • http://tiriburud.rf.gd/cg_police_si_syllabus_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/differences_between_tabloid_and_broadsheet_newspapers.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_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 3724 bytes
SHA-256: ce1f2f1b7cf01411f399fe45fd9e7173cccc48f818ca70f713c0a25d524e6157
font_01_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 5152 bytes
SHA-256: 1c2b149299abfbf5593043797207b731149aa3e6bf3b1ecf35745d877f262603
font_02_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 13852 bytes
SHA-256: b36c5f2179bbb79a12de0179cda3fef53db9b0b539fbd573707d6b85eca20097

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