Malicious PDF — malware analysis report

Static analysis result for SHA-256 57588b2ff67147b2…

MALICIOUS

PDF

99.5 KB Created: 2021-04-01 12:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7a4ed68ced2ebf0836d3a68519dd8a76 SHA-1: 7f8e22a95b88dbd3080b80aafbb7bea9c7d27c16 SHA-256: 57588b2ff67147b22aa4c2c6709fae36d6f980ca428612b5304b39578ab97202
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://fokemale.ru/award?keyword=adobe+illustrator+pdf+exportieren PDF link annotation
    • http://dutarotanazosuv.medianewsonline.com/online_aadhar_card_file_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465930/normal_601f179602da2.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/hdNjjhi/mahoning_county_sheriff_reports.pdfIn PDF document text
    • http://harmony-market.ru/baby_soothing_sounds8umc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_6065689d21dba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_6004c18469477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_5fdb36328234a.pdfIn PDF document text
    • http://wugipesirexoxof.mygamesonline.org/42067255346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447087/normal_605517408e9db.pdfIn PDF document text
    • http://podarokinsta365.site/em_basic_podcast_back_pain4w6gd.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/cant_stop_wont_stop_book_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_600477fe1e528.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ggirias/81003860383.pdfIn PDF document text
    • http://titanof-filtr.ru/569377675503avzq.pdfIn PDF document text
    • https://cdn.sqhk.co/nadizolobe/idXYjfm/fofagare.pdfIn PDF document text
    • http://f1l3download.site/gopro_4_silver_sd_card_capacity38xmh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tigagatu.atwebpages.com/annabac_physique.pdfIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_83c3aefc47fd4ceda0a595093d32f816.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_fb74bf4b6041487090637930d20a23b3.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_b1bcf9ef1fc24459beca88d8d9527c9c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BA 5116 bytes
SHA-256: dc3efbdbb24e78edf75a17ae6de5ccbe117d033cddcb75be6e05c734b587b895
font_01_sfnt_off00014726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14726 13428 bytes
SHA-256: db22985ba95c107d5626cab9f2284caeb6dd502d93d269d71c74212bcab8cba1
font_02_sfnt_off0001728a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1728A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.