Malicious PDF — malware analysis report

Static analysis result for SHA-256 5689c3cc8b5d2d18…

MALICIOUS

PDF

97.9 KB Created: 2021-05-19 10:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b498a9210201e73942c8655482917cbd SHA-1: 2aa45483e065eea1963c27155fb3e0dd2101f6cb SHA-256: 5689c3cc8b5d2d18f05ff013fd457bcaa0439304bec119cf6940142cd17d8e15
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure related to business profitability, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=is+an+aquaponics+business+profitable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409621/normal_603ec08a09990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454304/normal_605ca43a168c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fdb562647b76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425211/normal_5fced2a5ce6ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5fdc70d2b6eaf.pdfIn PDF document text
    • http://miravozexafoxiw.iblogger.org/restaurant_business_plan_template_free.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://s3.amazonaws.com/pusori/68678395283.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/rakuxepozabebajazesug.pdfIn PDF document text
    • http://lamuvija.epizy.com/adobe_acrobat_reader_for_pc.pdfIn PDF document text
    • http://vevurikadi.epizy.com/analytical_reasoning_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/pojuxasurirugaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3281857a-f688-42ad-860e-50c5263b3ebe/conversion_micro_gramos_a_gramos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d379275e-9449-4bc9-88d6-487dab1cb06c/17942261039.pdfIn PDF document text
    • http://puxabilaxomim.rf.gd/srimad_bhagavatam_puranam_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51119489-0945-4634-ba60-628eea542448/tc_electronic_hall_of_fame_2_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/fms_simulator_model.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/damumosudopilumigomezo.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/sap_fiori_development_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/dabobavofa.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_off000130d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D2 5096 bytes
SHA-256: 5987ceb38da55bb263ded22f582a7946e5a3aa1df1e411cd7becb60b1541017b
font_01_sfnt_off00014225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14225 11944 bytes
SHA-256: 3e368ad29554e455104069e88bdc4a60722a311d44209e97c99420231115636a
font_02_sfnt_off00016a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A9D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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