Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19127925a7f8a56…

MALICIOUS

PDF

87.1 KB Created: 2021-02-15 18:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bca537836b31bda864e38e9a72abed50 SHA-1: 7ff1250ff00874758b9051141760d93e05ded31a SHA-256: d19127925a7f8a560ca68181ee4ba37e737d13ad52bf9ffdf7a7d833fdb3a97c
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference an 'Xbox 360 remote charging station', suggesting a lure to entice users to click on the malicious links. The presence of a link farm and a critical ClamAV detection further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=xbox+360+remote+charging+station In PDF document text
    • https://static.s123-cdn-static.com/uploads/4404990/normal_5fefb2f91da9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_6001d891938f0.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/hdRjahf/6241745495.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/cgjgdig/25058656701.pdfIn PDF document text
    • https://ripufimavewin.weebly.com/uploads/1/3/6/0/136099474/rubezawel.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/ges3jjT/escape_game_lab_sentier.pdfIn PDF document text
    • https://cdn.sqhk.co/zixifazod/phjGAHp/toxirubiwaleko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5fe7c119a0ee4.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/eFiagjw/attack_the_light_apk_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_5ff56a02251d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_6028b8668ba65.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/c5iibVN/ecommerce_website_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://silapopo.epizy.com/dell_latitude_5490_specification_sheet.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30F 3032 bytes
SHA-256: 9bd58b7f3a64cdf6957bcac4061ed67f519300aa2ed6fe3b87c734d43bcfcd74
font_01_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 5828 bytes
SHA-256: edc558aa21918c05119a32382317ce6459a5ed96e285daa502c141992de0ece0
font_02_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 6724 bytes
SHA-256: d56ff884f37c263ef71e1c6b690e58662ebcc7ddc4dd5540b7163d17c5eb2fa6
font_03_sfnt_off00011367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11367 10880 bytes
SHA-256: 10e0b14f6b2098db7a2e96408985a7e97d5568f0951eef576fd314e03cad3b04
font_04_sfnt_off000138d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D8 16272 bytes
SHA-256: b066ae9d28a19554c852f724746183cface82ee47b14b2610acd2509d37db43f

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