Malicious PDF — malware analysis report

Static analysis result for SHA-256 b049f7ebc7d9df61…

MALICIOUS

PDF

67.1 KB Created: 2020-12-27 13:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6816252750d0ea4bfac8fe475973b697 SHA-1: 4bd8eccf5bafa47d666795d342f3cfa891377856 SHA-256: b049f7ebc7d9df617e539dfc0daa44de8b2934e5f9fea10213fc914d6b108eef
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of a large number of external links, specifically a 'link farm', suggests an attempt to direct users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing or SEO manipulation attack vector.

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
  • 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://traffnew.ru/123?utm_term=how+many+bytes+in+a+word+document PDF link annotation
    • https://cdn.sqhk.co/guzunilepin/jbggCxX/sipanajeloredog.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/b9b62e.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/fnBbjdf/trial_xtreme_4_hack_mod_apk_download.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5337016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500882/normal_5fc6d0a2abf00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_5fd87fb240619.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/vefej_goruzimisi_bimexunixib_mevijizim.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/gebukil/68411926384.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/88596891005.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/tigowixuzusisu.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/corporate_social_responsibility_report_starbucks.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/western_civilization_textbook_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/62887014527.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_off0000c9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E1 5348 bytes
SHA-256: 05757a9817ee6fadfe8b74711c7deb17520c264244c5e3079dd571d9c084b621
font_01_sfnt_off0000dc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC03 10480 bytes
SHA-256: 35e4254a325e48b7d614923ecdd0391db128ed92420260d063238961fa5a106a

Open this report in the interactive analyzer, or submit your own file for analysis.