Malicious PDF — malware analysis report

Static analysis result for SHA-256 01517ab24ce1b045…

MALICIOUS

PDF

80.2 KB Created: 2021-04-13 13:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 47f62a82ad02e66e8e94cc948f6c1744 SHA-1: 7bb8a69c01c683f7fd36b716ddcacf5b1a005d46 SHA-256: 01517ab24ce1b0455ce6a5df5a0b6dada9aa88e8a657a3cc24fc0410fa2dc31e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, and is detected as a phishing trojan by ClamAV. The document body, though partially corrupted, contains a question about a doorbell, suggesting a lure to trick users into clicking malicious links. The presence of multiple external URIs indicates an attempt to redirect the user to potentially harmful content.

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://resalured.ru/strik?utm_term=why+does+my+battery+doorbell+not+work PDF link annotation
    • http://jushq.pro/mavuveurlum.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/pRdq6pm/15244807631.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/child_development_worksheetsb0xdk.pdfIn PDF document text
    • https://cdn.sqhk.co/xufilisakula/fjjAQgc/picture_collage_program_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/cjg8igk/wrap_rope_for_sale_cape_town.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/BkRhcic/8676761016.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
    • https://uploads.strikinglycdn.com/files/7ad46caa-b390-4025-aab8-b93684d7acbd/vofib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d72d2b5-2dbf-441b-ae56-df4cc15af4d7/baraja.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/21060067771.pdfIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_0bf4639d48b64535bca176b4af27bf8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobito/midekubobusurumogavudoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e210ce-5e7e-4496-9950-50dbd886cbb0/37456533103.pdfIn PDF document text
    • https://da25564d-e3c2-4b9b-87ba-dd8ce2ae78d4.filesusr.com/ugd/c82cd6_1fd2e94c181f40bd971f051a43e01e6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32cef0c5-45d9-4cb2-b2a0-dd0a0206f7b3/dumeselolefupebub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca43a194-8d4f-4760-a114-562b4efd4f82/99173152682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5297b9ff-7e24-4060-9dac-1b766003ea28/pejiwibinel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd48884-6258-4018-a4d8-5b177165c5e8/sulozinugovakiziriloson.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/dililidulatemade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8edfd877-f981-411e-b2c0-92c0a22f1571/22535255644.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_off0000ee54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE54 5216 bytes
SHA-256: b6c21abafb24bcf80762d51546c5d273195b21f54901b0a09b08967cf555ebff
font_01_sfnt_off00010000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10000 10960 bytes
SHA-256: 0cb0dec84d412633dfca7e57364f9dea4d24e9112339e9ad638e43caff6fc53c
font_02_sfnt_off00012573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12573 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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