Malicious PDF — malware analysis report

Static analysis result for SHA-256 653dda9ba01eeae4…

MALICIOUS

PDF

65.9 KB Created: 2020-12-31 19:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 887a2476772ef83e39c564557d3ee361 SHA-1: eae0754fcbcad731543677abdb58dcbcf926d2f3 SHA-256: 653dda9ba01eeae458da45761ccf877df08f3e1cb7d6c2af72f672d3a1cfe944
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded links, such as 'https://traffmen.ru/123?utm_term=flarp+noise+putty+dollar+tree', are likely part of a phishing or malware distribution scheme, aiming to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://traffmen.ru/123?utm_term=flarp+noise+putty+dollar+tree In PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/ad9023.pdfIn PDF document text
    • https://zonebudufekepok.weebly.com/uploads/1/3/4/3/134382159/6691228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fe1150ced391.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/wovigebi/android_builder_pattern_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ffcd5a5-937a-4972-bca8-2ea09c5c4a8a/good_pub_guide_oxfordshire.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/76661706271.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/nikoniwakipizuzedo.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/create_a_data_table_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/actress_photos_bollywood_wallpapers.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_off0000b6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A7 5008 bytes
SHA-256: fda50d495fe35cd0d149e16289cd34c29ea4ba913a7eb5d1fa8158f797cc7db4
font_01_sfnt_off0000c7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BF 4448 bytes
SHA-256: 722d3e6f0e391dcd8174afa01cabfe931b28ad2d65431f29ffa5057da996dcc3
font_02_sfnt_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 10172 bytes
SHA-256: a3ac257fd463d6a7a29ed7be8337c549085afe9bb62c1db373e9a5e88b703994

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