Malicious PDF — malware analysis report

Static analysis result for SHA-256 46794627840b2719…

MALICIOUS

PDF

80.7 KB Created: 2021-03-17 00:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3d3426836cc8fb7e7319a55246cd1d8a SHA-1: 476cf5c66a73f98fa32f064aae50099118cb6350 SHA-256: 46794627840b2719091d78f58b89f133b38a5aab7c96a73796ae3bb934aef6ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these URLs, 'https://lozipotod.ru/wix?keyword=due+on+receipt+artinya', is directly embedded in the document's body. ClamAV detection and ML classification strongly indicate maliciousness, specifically as a phishing or trojan delivery mechanism. The presence of embedded JavaScript, though not explicitly detailed, is common in such malicious PDFs for executing exploits or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://lozipotod.ru/wix?keyword=due+on+receipt+artinya PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5fdd6fb3edaaf.pdfIn PDF document text
    • http://votofeveta.iblogger.org/are_cuda_cores_important_for_mining.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485446/normal_603446f917583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_604661c2219b3.pdfIn PDF document text
    • http://runepudojeb.iblogger.org/dixeluful.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/deformers_trophy_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_0db39df00bf04422a9f0c19ecb24f098.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/24392460072.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/missing_number_puzzles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/bootstrap_align_form_control_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1735dbb-b954-4f52-b470-28e560788180/how_to_do_an_average_of_an_average.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/71459742294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38ac17c-d049-4e2c-8fd1-736cc76ed431/ratoreviwevamokizopaket.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/anandam_naa_songs_com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81ed112-5f38-4e0a-8350-d75044e30480/tijolubudeviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ba3cc0-6d32-4378-8ff5-5ec94c5c26ca/how_to_get_the_god_mask_in_revelations.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/65929611897.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_11fb455a3aec493882709e1863dd10dc.pdf?index=trueIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_c21107ece7714413a093626fd42c5695.pdf?index=trueIn PDF document text
    • http://wamigorudazuz.epizy.com/zugewekax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479d06c0-312d-4830-b507-5c1d40933071/zefeguwe.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/10941076909.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_42272742a45947b697dfe4ab8840e92b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/54680651672.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_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 4816 bytes
SHA-256: c28f4dde905738d44d99eade6e201ebe02392a75daca4876abd3fce04a8cd482
font_01_sfnt_off00010f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F05 11152 bytes
SHA-256: b83131a2bc3ed9abed5edf66c5b1a34ee306774d35442afde3284c0d756ef94d

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