Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c0b84e0a2a427d…

MALICIOUS

PDF

93.1 KB Created: 2020-11-26 02:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5beec06dff8424626d5dbdc39bee83d2 SHA-1: 25f82dd970e72f2b25b3696d310322ff184b1bfb SHA-256: 89c0b84e0a2a427d4f8dba9ec8328da36f29ce49f2dbb0e29731aa989394f756
156 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. 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://traffnew.ru/strik?utm_term=battlestations+pacific+how+to+unlock+jets PDF link annotation
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/rigitala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_5fb8a98e84eb8.pdfIn PDF document text
    • https://gupaxapofigovi.weebly.com/uploads/1/3/4/3/134356466/49de58.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/zobuwubedak/running_man_409.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/peliculas_de_disney_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/pedaz.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/conformity_and_conflict_15th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/wenuwoxixu.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/tizanewetuke.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/vunijowilusajumepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a10fe9b-2d89-4393-8b70-61d980b04abb/kajekupiwutusimoj.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/brian_quaca_wife.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/zoripuxavekadagetuwo.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_off00012feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEB 5288 bytes
SHA-256: d064bd385a12ef3f92ed1ddb7577d0a5cae29e4232a40f6c3524b3aa1c90f102
font_01_sfnt_off00014201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14201 10812 bytes
SHA-256: e514310a5e16d79b89dc7969a40a5668ae50baee5a89ec05d555e11f12dc8aab