Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f600a32246cf07…

MALICIOUS

PDF

131.3 KB Created: 2020-11-23 12:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a2e4b7349bd0d68860f71ea780847dd SHA-1: 24abdca416c381092a5f656afef47518ca756571 SHA-256: 54f600a32246cf07cfbb1b85ccf96c1e351d84f10ab0caccd9bf78454b644784
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 0.9991

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://traffnew.ru/123?utm_term=gravity+falls+merch+india PDF link annotation
    • https://xezefamije.weebly.com/uploads/1/3/4/3/134352880/xomamirofir.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/xifexapixisimorax.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/salade/dilinomajivojenepakegakox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e9d313-4ba7-4fb9-bec0-8e8e1d098fc2/50119725105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6643cee6-fe9f-43cc-807b-2276425a4021/marorebikekafat.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/raven_johnson_biology_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/misapepofiwisusolanej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e17b53-3ad5-4a43-9242-8af5d5cd4030/como_durar_mas_en_la_cama.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/zojosujovugox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10504859-b7f0-4de0-9845-d964b60bf017/boleyn_family_history.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/goruj.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0001b1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1C1 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off0001c23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C23A 5452 bytes
SHA-256: 154a31859bca0cfb87391198becdc3a97b6907bf9773edbafb2f62289034d4be
font_02_sfnt_off0001d4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4A8 13312 bytes
SHA-256: 2cc2ed12bd3a0ea906456ac81a557b681b3a0a4bd51028a7935af534742a435d

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