Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb39b9f697b04ae…

MALICIOUS

PDF

83.5 KB Created: 2021-04-28 03:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e49c84958b60ae333ac6cea095999dfb SHA-1: 961f9103ebdac8b39ba44a6d10a870d7515ce903 SHA-256: 7eb39b9f697b04aea2a7fdaf912d28679fc60df9824b61a04e09f4a23241401a
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://xezojetit.ru/strik?utm_term=the+master+key+system+audiobook+free PDF link annotation
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/wuguje.pdfIn PDF document text
    • https://pituxujufu.weebly.com/uploads/1/3/1/8/131856071/5497068e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_5fd22cf2e2699.pdfIn PDF document text
    • https://xododasewa.weebly.com/uploads/1/3/4/6/134600374/pukurabulipizari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_600c11844e1ed.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/8256487.pdfIn PDF document text
    • http://storergoods.site/types_of_group_norms_in_organisational_behaviouro5z3a.pdfIn PDF document text
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/kilenizi.pdfIn PDF document text
    • http://propovar.ru/sigowirifopukiburonesak6xd2f.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/punurum/alt_balaji_bekaboo_full_web_series.pdfIn PDF document text
    • https://74f55dc1-c9a5-4be3-8cb6-5a41d2e6c5ca.filesusr.com/ugd/bacb18_392b61c2c4b448bfab77c36c2c6f90bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/microsoft_access_2003_free_trial.pdfIn PDF document text
    • http://sulegezusaz.epizy.com/92309332271.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/how_to_use_garmin_s60_golf_watch.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_63826ecc7c33412fa760c5c70efcaa84.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwara/shining_soul_2_ninja_guide.pdfIn PDF document text
    • http://togipumenotu.epizy.com/dijufoba.pdfIn PDF document text
    • http://kijenor.epizy.com/zumatalivajizebijesomo.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/10482021998.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_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 5372 bytes
SHA-256: 9995c58731f6e8eb586739680f09101b58a87279ce330e56d95641d66bb2841a
font_01_sfnt_off00011b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B65 10896 bytes
SHA-256: d4faeaf8bef0928e9f05f26dbe60ba5c12c4cf5371cef9e37aa9eae635d14745

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