Malicious PDF — malware analysis report

Static analysis result for SHA-256 568bf60c661cade0…

MALICIOUS

PDF

73.3 KB Created: 2021-04-16 05:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3ceb117283a1bf4d1d2e7d0bffa88eaa SHA-1: 28b4ce24b20d25fd88d9c2b91590ddcc00593e4a SHA-256: 568bf60c661cade0770fb00dcb01147e62e867ea9bf0c2a7a6cdd37252073f2c
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'how to use blue yeti microphone'. The presence of multiple external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+use+blue+yeti+microphone In PDF document text
    • https://piwusobalusuwav.weebly.com/uploads/1/3/2/3/132303181/nubumozidekobegime.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/everything_i_never_told_you_celeste_ng_free_download.pdfIn PDF document text
    • https://guzagotoxi.weebly.com/uploads/1/3/5/3/135313280/49e8430dd5.pdfIn PDF document text
    • https://basivuto.weebly.com/uploads/1/3/4/6/134646412/c5d92c8a0aed1.pdfIn PDF document text
    • https://zusamazoboxo.weebly.com/uploads/1/3/4/5/134527389/tapafig.pdfIn PDF document text
    • https://mepuralomelefaz.weebly.com/uploads/1/3/4/4/134494325/7829836.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magegefopo.atwebpages.com/99458609745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a72515-7341-48a0-9c49-d22124e4859b/epson_wf-7520_ink_cartridges.pdfIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_4dac2781c33242acb735ea6591233132.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizaxo/brine_shrimp_lab_report.pdfIn PDF document text
    • http://gipetiwivi.atwebpages.com/ic_723_voltage_regulator.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/bodyweight_workout_at_home_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/gexidunapaxuradezix.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/foxonag.pdfIn PDF document text
    • https://43e59f28-96d7-4988-bcd6-55bc25f76e69.filesusr.com/ugd/372bdc_6c092144517a4648a9e43c798033d1d1.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_f805a1bcd13c4c0a9b7bbe638ccb079e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/telasebisu/45851690318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308f6f99-1660-4baa-a029-a6d1e2345844/borerurikatowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b995c7-a7f8-400e-895b-e640bd0512ad/how_to_add_a_double_electrical_outlet.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_off0000dffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFE 5260 bytes
SHA-256: ffbed318d4106dded3d5a6ea928a0d35d976bb67922ce4a7c4f0f440843055e4
font_01_sfnt_off0000f1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 11332 bytes
SHA-256: 708d08eafccf52959b5a811bd9eba0e307a0e5ee561df873e089f1e4073ee6a5

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