Malicious PDF — malware analysis report

Static analysis result for SHA-256 865c10b9f3bb287e…

MALICIOUS

PDF

75.4 KB Created: 2021-05-24 06:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 43803a84ecbcf2e2200603a0a8091ca8 SHA-1: 609b1060e61e09a473f8a267d4c7222bd6971fec SHA-256: 865c10b9f3bb287ee0a18635d3d6c1d860c31ae9be6a91c206edf9a22f9d7e07
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDFs, suggesting a link farm or phishing operation. The ML classifier and ClamAV heuristic strongly indicate maliciousness, specifically related to phishing. While no scripts were explicitly extracted, the presence of numerous external links and the PDF structure itself are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=why+isn%2527t+my+carpet+cleaner+spraying+water PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458404/normal_60660c27b30f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5ff181ef9716e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_600c64a06556e.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/8496973.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/1654516.pdfIn PDF document text
    • https://gufubavofunopi.weebly.com/uploads/1/3/4/7/134704705/9be1d38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5fdec89421d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_603d302628e05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_601af4e316f66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473039/normal_5fe2b5fd75a66.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/mozedijiz/make_money_online_paypal_no_surveys.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/zmodo_audio_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/70731571134.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/bavewanafuwamibi.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/ubuntu_14._04_64_bit_iso_file.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/kujidozilagokam.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/sharp_aquos_50_led_tv_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/51134588399.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/45704552444.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/37612393337.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_off0000e5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A9 5588 bytes
SHA-256: b78fb3fd761a728210a5c6ebe0ace73a1b7f931a6a459f79fb335b695ce1a92e
font_01_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 11612 bytes
SHA-256: ef28167ed4385a6e0df66e4428ce5483b375f078a23b1e0f34c8aa233d70aec7

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