Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2fb2d899307bd6…

MALICIOUS

PDF

86.3 KB Created: 2021-01-25 06:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 341acf0b11fa12bcece0b4a9b93c6e3e SHA-1: 9369ade772bcbb8a5a6f2e7df50663fd0f0e741d SHA-256: 5d2fb2d899307bd6c6f5590ecdc87ad23718b2ca76e0fcc079e34ae73a263304
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The embedded content, though heavily obfuscated, appears to be related to 'Xarelto coupons discounts', a common lure for phishing or scam operations. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's primary purpose is to drive traffic to malicious or deceptive websites.

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://druttle.ru/123?utm_term=xarelto+coupons+discounts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483088/normal_5fddda01bd86d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_600769570f8d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_5fd2d09c0488b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_600dfb92a77c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452845/normal_5ff18334a44bf.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/i4heihH/cross_stitch_kits_uk_modern.pdfIn PDF document text
    • http://albatros-trans.ru/animal_print_carpet_runner_for_stairsjpvw9.pdfIn PDF document text
    • https://bogilerilixami.weebly.com/uploads/1/3/5/3/135345361/3572794.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/bukafifuwov.pdfIn PDF document text
    • https://lefusavuforuv.weebly.com/uploads/1/3/4/4/134490278/65ad894876cfe.pdfIn PDF document text
    • https://zogudoweno.weebly.com/uploads/1/3/1/6/131637773/jajerabixuxat_bivuxikomajo.pdfIn PDF document text
    • http://marinarus.space/outliers_meaning_math656eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372358/normal_5fedfeb121d87.pdfIn PDF document text
    • https://cdn.sqhk.co/vakusukereju/hgjdhio/hashtags_for_tiktok_copy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386349/normal_5fcfa3235ff20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 4928 bytes
SHA-256: 468895349df6d967a211d5a701519daf26438b8682cd90a0dae33215bc253ff1
font_01_sfnt_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 10648 bytes
SHA-256: c19a79bd9e5a5a88b61aee70d58f3ac1a0dc88b14da2e6064001c2a88724c1c4
font_02_sfnt_off00013e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E00 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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