Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a2291d30562618…

MALICIOUS

PDF

82.7 KB Created: 2021-03-02 03:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c4ddec20ad32e2316ac8e4542ef06ce6 SHA-1: dec6c0b2767243d8fb1fd5666958ecfcc12d6685 SHA-256: c0a2291d305626188f493c0b0a6a9e3329a70fd24871828ca7ce834f18c07534
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 external websites, including a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links suggests an attempt to redirect users to malicious content.

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://dafemum.ru/123?utm_term=gps+essentials+apk In PDF document text
    • https://kinikike.weebly.com/uploads/1/3/5/3/135324172/peletabelisesunoko.pdfIn PDF document text
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/f6c5935e9047fd.pdfIn PDF document text
    • http://koguvagad.22web.org/51476120456.pdfIn PDF document text
    • https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/686eacc6975c5b.pdfIn PDF document text
    • http://katermore.ru/hendricks_county_sheriff_police_reports2vf01.pdfIn PDF document text
    • http://kinoxca.xyz/28508312206e6ahi.pdfIn PDF document text
    • http://xajoraxi.22web.org/zukupa.pdfIn PDF document text
    • http://kungfumalibu.com/crossfire_car_for_sale_in_nigeriadshq0.pdfIn PDF document text
    • https://kinumefiboposif.weebly.com/uploads/1/3/4/8/134865532/tijiripoxa.pdfIn PDF document text
    • http://sapufawo.iblogger.org/wing_chun_ring_exercise.pdfIn PDF document text
    • http://vwwv-avito.online/5024044396175aru.pdfIn PDF document text
    • https://takaranedo.weebly.com/uploads/1/3/4/0/134017801/c8220a5ed8b01.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/bajuse/adanaspor_forma_renkleri.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/interested_vs_interesting_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/birthday_nimantran_patrika_marathi_format.pdfIn PDF document text
    • http://kexobub.rf.gd/30941545336.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/14320793757.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/52350435444.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/copying_sheet_excel_online.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 4812 bytes
SHA-256: 5659d4c089e9d26b7f7cd0c15608b94367e37867d9ea119a9ec297fb6aabf8b8
font_01_sfnt_off000101b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B6 10864 bytes
SHA-256: 3b2bfb0e4fe239fb8be5a8cb65cf729e4147a7f57756cdbf9f1658d122060f8a
font_02_sfnt_off000126f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F3 16388 bytes
SHA-256: f5dd1b615ba8c2fd19a47bd4961a8c41712078094c6bce3010d4b04ee988083d

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