Malicious PDF — malware analysis report

Static analysis result for SHA-256 546b75c48ce6639c…

MALICIOUS

PDF

68.0 KB Created: 2020-12-06 02:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a19868c5bed33471f1b92add4a0797a1 SHA-1: 2dfe9fc2ba85b9d83cff19bebdef17d880f566fd SHA-256: 546b75c48ce6639c7f371997b2f574d4f4708d59e7b12709eed4980066387a23
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-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.
  • 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/strik?utm_term=body+boss+fitness+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f944154c56bd.pdfIn PDF document text
    • https://numokupe.weebly.com/uploads/1/3/4/8/134857704/2561318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5fa4ade56a23a.pdfIn PDF document text
    • https://musofowobe.weebly.com/uploads/1/3/4/6/134690343/jafunomagapaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1630612facd59ceb05ffc/t/5fc8b5d38bd7793567579db4/1606989268451/xikusamiriga.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/gajendra_ajmera_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/ignou_b._ed_convocation_form_download_2013.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17973bf71053ccb1438e7/t/5fcc18cb3ff1011540dfdcd2/1607211211893/pavewu.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/incident_investigation_template_hse.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/animals_of_farthing_wood_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/13481609118.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/magigiz.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/60211998094.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE43 5160 bytes
SHA-256: a082ab83e0199cd879165a9af29de51f5d3b6aaa1639a8585a74917fd0ce1767
font_01_sfnt_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 10428 bytes
SHA-256: 0b2f73525fec1088c7edf02b6e072ef2af2be9bd706e53a63f093bf244da0ee4

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