Malicious PDF — malware analysis report

Static analysis result for SHA-256 148ab6d52842e909…

MALICIOUS

PDF

71.7 KB Created: 2021-03-13 23:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06ed9a9abcb6dfe8a3ac55e940a0f4ff SHA-1: f3d52c47039efab8e4b8aa44a8a1c3191b78b903 SHA-256: 148ab6d52842e909c104e9a372280cad05259b7a7e3f9c4be59e26a601a59354
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, many of which point to suspicious domains or are part of a link farm, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The embedded URLs and the PDF structure strongly indicate a phishing or malware distribution campaign.

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 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.
  • 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://xajibur.ru/wix?keyword=chapter+2+extra+practice+lesson+2.1+and+2.2+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5fe380a58b1e0.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/qOBUhdo/donurogujetevuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489264/normal_603850b9ce876.pdfIn PDF document text
    • https://cdn.sqhk.co/mejeteboxav/hcHQsfx/91455015348.pdfIn PDF document text
    • http://sanamikegimelab.22web.org/lake_amistad_bass_fishing_report.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/kasetixinejibob_xasafozejarubo.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/yXYjfhh/classic_car_racing_game_for_android.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/wugusafusogelov_vegine_toror.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/a8980200cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474169/normal_6040ab454c108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_6036fb8fdc586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_602424ceba0dd.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/fivebo/lagu_ost_missing_you_korean_drama.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/chicago_pd_episode_guide_tv._com.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/44578479924.pdfIn PDF document text
    • http://bapaxofobawob.rf.gd/48862638596.pdfIn PDF document text
    • http://fofapisavinuf.epizy.com/19843228469.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/duwoxikiwelusi.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/football_s_coming_home_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/pelubidevudimasiz.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_off0000db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 5608 bytes
SHA-256: 40556c1e14eb99e343ae1f1b0fa7aaf848562a0c7cb70970a0d634b42a992e0b
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 10240 bytes
SHA-256: 5570309b64194e4b8700a6b2824547eb9f9f530c5f70fb5b2ed1106fdfea79f7

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