Malicious PDF — malware analysis report

Static analysis result for SHA-256 74adf5016aade959…

MALICIOUS

PDF

191.2 KB Created: 2020-11-27 05:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 43c4e97e92c65d3ef1657b4c2268f6e3 SHA-1: 186ce55bb6641ba063c56bd0722cbf1125798189 SHA-256: 74adf5016aade959f37d6b7679b57b7f8c03da4f6921132ff5eb9a9f33dfb22d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection, indicating it is a phishing or trojan delivery attempt. The presence of external URIs and a specific brand-impersonation lure suggests the intent is to deceive users into downloading a secondary payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common attack pattern for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://votewisuzub.weebly.com/uploads/1/3/4/6/134605747/1d5cdf6d.pdf.
  • 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://traffset.ru/aws?utm_term=android+studio++for+ubuntu+32+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f8bd1119fea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f8fade0de7f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f9f2ca2c1a8b.pdfIn PDF document text
    • https://votewisuzub.weebly.com/uploads/1/3/4/6/134605747/1d5cdf6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5fadcf96b13f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457000/normal_5fc0543af09ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8e08ed9b019.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/tiduro/89849590441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355561b3-b36d-4ad6-82c5-22aee10b9455/11870222464.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/75556954678.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/morukedokezunatudut.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/angular_bootstrap_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002afa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFA7 5084 bytes
SHA-256: e9e4909be10a8a8252b130eb9bb93cfd069be229f956a7d3b0dc78b50e8ab93c
font_01_sfnt_off0002c0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0FF 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0002c98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C98D 10868 bytes
SHA-256: 9b93c092591570f8fa3af6ddd350f4aa6c5e4762453e5907fa46762904ad5b15

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