Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e0a0da0ed602ad…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 00:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 33fb34c6052372e1280b5bc6804407de SHA-1: 983a30d2d22250d10dc359561f129109ca7525c0 SHA-256: 87e0a0da0ed602add14a1756442e9d094c83376cb14e96f8e697d90082680449
134 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm and has been flagged by a machine learning classifier as malicious. The presence of a 'Visual download / call-to-action button lure' heuristic, combined with embedded URLs pointing to potentially malicious domains, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/award?keyword=search+a+pdf+on+iphone PDF link annotation
    • http://gayerkan.com/dotoponekisadidupuven2958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_601cad49e2b78.pdfIn PDF document text
    • http://filmera.ru/11045864935xbye5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_603b36b36b623.pdfIn PDF document text
    • http://nuviteb.22web.org/kawiwogamaxazibaji.pdfIn PDF document text
    • http://sodaapp.pro/3d_games_for_android_2._2._2xcost.pdfIn PDF document text
    • http://citimart.online/2540267576109b7r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd217587666f.pdfIn PDF document text
    • http://1xbets-regs.site/native_american_agricultural_revolutionnck08.pdfIn PDF document text
    • http://bazezirovif.iblogger.org/how_did_william_shakespeare_change_the_world.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://gubodasitonobu.epizy.com/39481084408.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/jebome.pdfIn PDF document text
    • http://mevexunimapo.epizy.com/9774748493.pdfIn PDF document text
    • http://dobejul.epizy.com/the_thirsty_crow_poem_in_english.pdfIn PDF document text
    • http://rumuzuta.epizy.com/hamlet_act_3_summary_thoughtco.pdfIn PDF document text
    • http://sezijubiwu.rf.gd/what_is_management_administration_and_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/86048720469.pdfIn PDF document text
    • http://ziresam.rf.gd/how_to_survive_parental_alienation.pdfIn PDF document text
    • http://kelajerifa.epizy.com/easy_keto_dessert_recipes_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/hiragana_stroke_order_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/85540120815.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_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 4844 bytes
SHA-256: 7dedd307b409de3a2cfdf7d0575cbddaa746f656d963acd25bfb5695c3619ee0
font_01_sfnt_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 10708 bytes
SHA-256: f3dd74a5a11c3aaa5a2f37b0fd648adcf9237f996fa722d3d44b77cc283f1f81
font_02_sfnt_off0001236f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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