Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbe3c802ec58764…

MALICIOUS

PDF

80.4 KB Created: 2021-02-25 17:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e116f8a9ae657f37d93ab42dd28811ed SHA-1: 9a9f8157da2ba9b0d3fef5fbcd9f0ad4d22444c3 SHA-256: 2bbe3c802ec5876419dd4bb327fc027b0e1ddae920523691fcad48dedc2b2041
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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://jacksth.ru/wix?keyword=toronto+white+pages PDF link annotation
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/jitipazowoxapa-zokefa.pdfIn PDF document text
    • http://lotsmen.com/fukajugfgn.pdfIn PDF document text
    • http://alluniversity.fun/atiku_abubakar_biography549ay.pdfIn PDF document text
    • https://bogexisamalalu.weebly.com/uploads/1/3/5/3/135320210/c291969.pdfIn PDF document text
    • http://gratoramaa.space/rovatuloboxenurokijabxpqdg.pdfIn PDF document text
    • http://weinmvc.net/avicii_best_songs4b93p.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/has_aot_manga_finished.pdfIn PDF document text
    • https://sikalejewop.weebly.com/uploads/1/3/5/3/135341852/xifofojelurubiwop.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/vexoba.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/john_locke_vs_rousseau_social_contract.pdfIn PDF document text
    • http://converstarget.ru/17540097749n96j4.pdfIn PDF document text
    • https://vavujajakakef.weebly.com/uploads/1/3/0/7/130740385/8561211.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/51744008111.pdfIn PDF document text
    • http://damvglaz2.xyz/schubert_impromptu_no_1_sheet_musicjv26q.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/rogugagatuf/noco_genius_charging_times.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/nakawefamoxoweji.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/sccm_icu_admission_guidelines.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 3016 bytes
SHA-256: cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e
font_01_sfnt_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 5088 bytes
SHA-256: 3d04a041b18b7425be54cb8aa89af13e18df1b99e38b8ca1dedf517f12d59367
font_02_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_03_sfnt_off000110bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BB 10176 bytes
SHA-256: 7c7f71611b3a36f8e1822d5364fd796f67d3c8a7532deeb39f91184e92517da6