Malicious PDF — malware analysis report

Static analysis result for SHA-256 e551b58a7e3fb1be…

MALICIOUS

PDF

71.8 KB Created: 2021-03-18 22:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2318f236e62cf9dd70bddc7df739ce71 SHA-1: 051d84c4b0e6aee3f5450f65faffea57016fb147 SHA-256: e551b58a7e3fb1be204ef1dd91330e78761dec6bf7030339aee4f2309565f48f
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Deadpool vs wolverine wallpapers for android'. The presence of a malicious redirector and the sheer volume of links suggest an attempt to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/123?utm_term=deadpool+vs+wolverine+wallpapers+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4484358/normal_604f179facf89.pdfIn PDF document text
    • http://obschee.xyz/xopofazedalukekonujuwilifease6.pdfIn PDF document text
    • http://streamsweets.com/mevejalexubopmra6.pdfIn PDF document text
    • http://vulgargirls.fun/tajuvokojojuzubujosoxoqhbo3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465123/normal_60510cbf1cf0f.pdfIn PDF document text
    • http://swiss-gear-top.xyz/mens_haircuts_long_on_top_faded_sidesa0kfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_603e7e4a05d55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423145/normal_5fce22f87050d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_6045ef8f01b6f.pdfIn PDF document text
    • http://fanelafimud.22web.org/amazon_cloud_practitioner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447467/normal_5ff67f3d25bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_6025dd280a944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_9fc6b28d101c48729cb3aa45c97fd410.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/navesibalexupoxokali.pdfIn PDF document text
    • http://xutakubu.epizy.com/16882282455.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/kagogari.pdfIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_0d9c1534c5764c18805433b5db69a910.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/vukanebakas.pdfIn PDF document text
    • http://wurudoxozu.rf.gd/kyocera_3552ci_manual.pdfIn PDF document text
    • http://tasijojaludet.rf.gd/nakulenerosimamisolob.pdfIn PDF document text
    • http://bopufadepop.epizy.com/two_advantages_of_comparative_balance_sheet.pdfIn PDF document text
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_718448a549284ed6bcba2939729375c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/1336699420.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_54bc5d5813bb4c92a8396f5b43ddbeb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/vuzomativerusuwevolokeg.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_off0000db29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 5184 bytes
SHA-256: 53c3a4df3fa7643782fd9eb582256dfeb18e77374da8612d7f21f0a9d73e05c7
font_01_sfnt_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 10924 bytes
SHA-256: c3f6304980c5170fffaca8626ba95fd134e201f876196c7d923ea2160571910a