Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaba6adf533bfae5…

MALICIOUS

PDF

75.4 KB Created: 2021-02-02 23:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 748086790c88b583e802a6e24d6d5f23 SHA-1: 8c34ff36f09c173d5a324451a2da77ae2783808d SHA-256: aaba6adf533bfae5e0ec8bf73876316b7e07e6f636cecb967fd7ec52087f776b
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirectors or link farms, indicating a phishing or scam attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest this. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification point towards malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/aws?utm_term=handwriting+practice+sheets+for+preschoolers In PDF document text
    • https://cdn.sqhk.co/kizofapekeku/QDhbjgC/starcraft_heat_press_settings.pdfIn PDF document text
    • http://proba7.xyz/le_noirmont_suissejidol.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/cQgfjbn/background_wallpaper_hd_1080p_1920x1080_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/zTPM4ha/wodibozunewoginiz.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/kMchcpW/go_karts_for_sale_ebay.pdfIn PDF document text
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/woferipukemone-gerilurafuvirul-siwoduloj-rimuwalotofed.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/igjdASZ/launcher_3_update_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/hjLibha/cairo_supper_club_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/hajcib6/55483130737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gofiguj/7325515488.pdfIn PDF document text
    • http://numakuzugurewi.rf.gd/patefosuxuwovatisumosebag.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/chrome_desktop_sharing.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/48496198443.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/53133090185.pdfIn PDF document text
    • http://rewogaki.rf.gd/inventory_report_in_sap_mm.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/queen_malayalam_movie_movies_counter.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 5256 bytes
SHA-256: fe75f271620a54bba6c2baec8078887d7f63ff2f688186b4a76c2b9d27ef167f
font_01_sfnt_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000ed76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 10468 bytes
SHA-256: fa96674071567d1cf740343f3de50937ff6c070526419e1122869733bd538872
font_03_sfnt_off0001116e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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