Malicious PDF — malware analysis report

Static analysis result for SHA-256 654aafecae4df8c0…

MALICIOUS

PDF

72.9 KB Created: 2021-03-16 07:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: dce688d7bed2174b4fe95a1286de4cfc SHA-1: 949051e97674677f762a4cbff47fc9fe79230784 SHA-256: 654aafecae4df8c04223419bd37cc7cd8b8ebbafd7e6c4f3208bd213eda8836b
186 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary URL, 'https://resalured.ru/wix?keyword=hero+hunters+hack+generator', indicates a lure related to game hacks. ClamAV and ML heuristics confirm the malicious nature, classifying it as a phishing trojan. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common technique for obfuscating malicious links or initiating downloads within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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.
  • 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://resalured.ru/wix?keyword=hero+hunters+hack+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485318/normal_601db713dd945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_603168ee41615.pdfIn PDF document text
    • https://ziwagugo.weebly.com/uploads/1/3/4/1/134131511/pidepuna-gesezin-babuzebakupuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fd0ff4e37451.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/bestiario_argent_espaol.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/gabepojorifatek.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/meriwir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_601d2fc1827d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_6018694bc9b78.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/what_are_the_elements_of_psychoanalytic_theory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_6025f20871e4a.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/puzujorigejiwir.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/34727714878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_601e18b79ff7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419629/normal_5fc5b0883ce94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc98fbda0a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_5fd916292e730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_81359c2e21674157a0390b88376c9181.pdf?index=trueIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_2f0c94720be94cf5936206d414ebf4ef.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_9196f305024c408d843d7ebc4a814478.pdf?index=trueIn PDF document text
    • https://a26b494c-4f54-4b9d-aaa3-e02d462d315a.filesusr.com/ugd/c6268f_7c0c9f0625a4445395c11f33cbff7827.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_32c5bd5113d24df28a41e7433d2791ec.pdf?index=trueIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_81ee4d2d86fd4d94b7ec25e446e1f9bd.pdf?index=trueIn PDF document text
    • https://6fc76513-a17a-4053-940d-bef108f5ea85.filesusr.com/ugd/3a5ef0_50e3756141e640eaae6b147ee573369b.pdf?index=trueIn 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_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 5052 bytes
SHA-256: d2feaa0c95abf566324d9674a725093f7105d9fd673dd7117dd11c09cbce0de9
font_01_sfnt_off0000f1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F0 10736 bytes
SHA-256: 3d8ff0dd5735d84116b53d4cbc5df8fc1731a74f3bd55b24745765b538dea952

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