Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ceec111228f2db…

MALICIOUS

PDF

164.8 KB Created: 2020-11-03 21:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7dbff24cae63a24bb208cbbbd9dce4b8 SHA-1: e35fc10ccb6dbf247ca99b85bb5607fedd752a0f SHA-256: 97ceec111228f2db739fc6640382a7ff17450db3a7276db631f591512a036028
134 Risk Score

Malware Insights

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

The PDF document contains a lure referencing 'Fruits Basket' and embeds a URL that is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/aws?keyword=in+fruits+basket+was+akito+a+boy+or+girl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f8e10ae2cc88.pdfIn PDF document text
    • https://zipiluzus.weebly.com/uploads/1/3/4/2/134234939/5658075.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/podixebimu.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/leguvefu/69720762107.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/buvunomeladiniba.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/36428324594.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/marguerite_duras_hiroshima_mon_amour.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/calendario_2020_chile.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/gewofefivajuvowezikimaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/boy_meets_girl_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/common_congolese_last_names.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9BF 34528 bytes
SHA-256: 5a2cffdc52a58fec2d63d889b6eea7e4f1d0db0f5f7d47c47d95e31b90515eb0
font_01_sfnt_off000224e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224E6 5272 bytes
SHA-256: 084cf1759d3b0e2d7a59d97d33f20b2aff1a1173b0170abfd1afe212b3314524
font_02_sfnt_off000236fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236FE 4352 bytes
SHA-256: 80affed6bf7e00cd451a2d3cdc9995b5fa37e5ff615de59f267fa36ec903cede
font_03_sfnt_off00024524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24524 12488 bytes
SHA-256: 92e4a37b6efe6a5234ba47b1efb2114c884846789dbd730b0b0688be81e289cd
font_04_sfnt_off00026dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26DD7 16132 bytes
SHA-256: 60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd