Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d361e8e466cf74…

MALICIOUS

PDF

90.0 KB Created: 2021-02-19 15:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d2da2eeab0f7aab16d291abe1828b925 SHA-1: fa34fcda1eb07d68d971bcc0c2ca365c81bdf06f SHA-256: e0d361e8e466cf74831aabcae8ed5cfd06d933378ae34c02c99212858dc61f9c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though heavily obfuscated, contains a URL that suggests a lure related to online dating questions. The presence of a PDF link farm heuristic and ClamAV detection strongly indicates malicious intent, likely to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=what+are+good+icebreaker+questions+for+online+dating PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5ff93652a69c1.pdfIn PDF document text
    • http://voduvalegef.66ghz.com/3485697998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424683/normal_5fdf4b96f3622.pdfIn PDF document text
    • http://seamanygau.best/free_printable_brain_teaser_worksheets_with_answersc9g41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450898/normal_5fc8ebd568b3f.pdfIn PDF document text
    • http://trackengine.host/accident_report_form_dmv_oregon0q962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_60248bf1e8037.pdfIn PDF document text
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/fekakegega_vinake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5fe94b728b808.pdfIn PDF document text
    • http://naturwows.space/34933038108n32v4.pdfIn PDF document text
    • http://xufotegebiv.22web.org/sebir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_60019158d5c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_602197b471668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5ff1586921202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fd8da720f174.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/f03bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dolevegun.epizy.com/71436145791.pdfIn PDF document text
    • http://fowowoge.rf.gd/multiplying_binary_numbers.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/limiperekebemakesonib.pdfIn PDF document text
    • http://xonifovozub.epizy.com/gopisowagorasutuzude.pdfIn PDF document text
    • http://kezakixekinefa.rf.gd/metal_gear_solid_2_pc_black_screen_windows_10.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/screencast_software_for_pc_free.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_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 5628 bytes
SHA-256: 19728458d8af51cdfd8dd303c5fdfe22f504bcf489c946ab2708892934af6fc7
font_01_sfnt_off000135cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CC 10592 bytes
SHA-256: a14fe21ea45815075e33a9a4e32c6a084c94d42c129562a5fb11c232acbee8f5

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