Malicious PDF — malware analysis report

Static analysis result for SHA-256 0364e0e11e9d13f2…

MALICIOUS

PDF

74.3 KB Created: 2021-03-22 22:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0fb21b5ac168c2661df704fee120f1ed SHA-1: b4fa414c8503675916f84a687e0e5903ab71b5d7 SHA-256: 0364e0e11e9d13f256cb4a2a78ebff380baba925746ef6dc53c7f856f1f7fbb6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://ponafet.ru/123', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/123?utm_term=parts+of+a+cell+diagram+worksheet PDF link annotation
    • https://wavidamos.weebly.com/uploads/1/3/4/3/134316051/91369b06b77d0ad.pdfIn PDF document text
    • https://zilibadokaji.weebly.com/uploads/1/3/2/6/132680781/vuleniwemejefu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391331/normal_5ff89bcde7a8e.pdfIn PDF document text
    • https://gagopono.weebly.com/uploads/1/3/2/6/132681316/08e82bb5bd19540.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/8047726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_600c966c550fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474169/normal_603a4a0353bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5fe820615200f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490127/normal_5fe4d275a6cdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480412/normal_600858e355889.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/dazawojob/gyn_oncology_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/19809792009.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_0ad7faa7ae344938a5238411f7571d30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/24323310729.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/8840019856.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/83546258808.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/71750059985.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/amazon_river_video.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/compare_and_contrast_essay_topics_8th_grade.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_320eec78f2b842c09f99622c544a04c4.pdf?index=trueIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_9d92ccebcdcf432f90637085af41d0b3.pdf?index=trueIn PDF document text
    • https://a9b7993f-6967-48c1-a2c3-d5bc86fe985f.filesusr.com/ugd/ea2be3_b18edc966b6c411589fd5932564efa3c.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_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 5592 bytes
SHA-256: 542dec704541b7eefd978b570b98aa2f67ff927485ccce23b13d9673db4f4eee
font_01_sfnt_off0000f6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 10796 bytes
SHA-256: f09cd6f5b846ce42fd43c63287bb1b1fdbe079175fadde0450927873fb767f00

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