Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ce1fb8b9cd941a…

MALICIOUS

PDF

73.3 KB Created: 2021-02-21 20:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aa4c265a6a832da0712002063acae46e SHA-1: 20fa428c5f3ae22186e81df6b79a910c256e91a8 SHA-256: 69ce1fb8b9cd941adb3d8a09be412de2b1d41accc988c0a0cc4de40c60a9dc80
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One critical heuristic indicates that a link points to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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/123?utm_term=rheem+power+vent+2+water+heater+manual In PDF document text
    • http://center-about.com/30696597403sozv6.pdfIn PDF document text
    • http://getdouche.xyz/tifepepomilabiluvakulinarorbv.pdfIn PDF document text
    • https://luvisumor.weebly.com/uploads/1/3/5/3/135390586/621a0a855a.pdfIn PDF document text
    • http://purpless.vip/pepixejipurena725u.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/lezota.pdfIn PDF document text
    • http://llloooodddd.space/60167079444ffqei.pdfIn PDF document text
    • https://gixisinada.weebly.com/uploads/1/3/0/8/130814349/f962ad.pdfIn PDF document text
    • http://cleanup-sale.site/gemexejazanugetavopigv206.pdfIn PDF document text
    • http://topcabinets.xyz/cravings_chrissy_teigen_free_download8p3n7.pdfIn PDF document text
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/wafozikelegaze_bojewef.pdfIn PDF document text
    • http://white-x.fun/unix_and_linux_system_administration_handbook_epubhci8c.pdfIn PDF document text
    • https://dakijixubuleze.weebly.com/uploads/1/3/0/7/130740496/wogalolixewami.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/jarawaxanivu/samsung_galaxy_s9_android_auto_wireless.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/vofomigupidozeje.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/bpm_full_form_for_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/speak_well_english_book_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/12435767039.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/milliken_publishing_company_worksheet_answers_mp4056.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_off0000e17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 5172 bytes
SHA-256: 18fcf12a375c3b12ebb79a4bcddc5536acd9012cd43829d399e07b92917faf78
font_01_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 10668 bytes
SHA-256: 0372099f8cf4ff6381079376028554ee851ccb7152320cfb201fac170d76e982

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