Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a137249677f094…

MALICIOUS

PDF

63.6 KB Created: 2020-12-02 05:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 688de78ea3969f3f96e7997b34ed3be3 SHA-1: d40a4790b4a200ce9f6ba19269500815e9cd0b67 SHA-256: e9a137249677f094de0ae7caf03b749f929f3f1460968b10b29d88bee6c8a4d9
164 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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 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.
  • 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://trafftec.ru/strik?utm_term=fish+tank+background+printable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412391/normal_5f98cd2e9353a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f90a1cc3d250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5f9a571a38b98.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/7529977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5f9f738ee15b3.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/d79d1cd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5fad40039a769.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/8117365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbdc95d-69db-43d6-95e2-869a70e68083/vo_tvoeto_srce_tekst.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/76822848812.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/appium_ios_simulator_platformversion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b7966b97992eb567a9c2/t/5fc6e5233d56556d142de00e/1606870308564/34918232914.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/office_2016_activator_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83ea370-ef67-416d-a036-3aa0b6016070/vuzov.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/ola_cab_booking_app_free.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_off0000bb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB49 5492 bytes
SHA-256: cff299554dfaa18a7e5ccf33fa929bbb1d652327e0acee9e1e2be0caedebd8d4
font_01_sfnt_off0000cded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDED 10372 bytes
SHA-256: 74b49bfbf257aa2ed822f55a0b5d7af19f0d74f2540c93b0311ea925b5d0bfee

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