Malicious PDF — malware analysis report

Static analysis result for SHA-256 b402d39d5d8c8050…

MALICIOUS

PDF

61.2 KB Created: 2020-10-01 05:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ff51d27d99c4cbbdda1b95487b105b99 SHA-1: 3019f4b1f61a20233c5ebca5cee49f8764c00368 SHA-256: b402d39d5d8c8050fd0f286a3a546c82336815f769f4ca0cb28064ab2d6d40ac
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=adharam+madhuram+lyrics+sanskrit+pdf In PDF document text
    • http://files.smflowers.org/uploads/1/3/0/7/130739043/wedatadarozaz.pdfIn PDF document text
    • http://dedaweg.piecedoccasion.net/uploads/1/3/1/3/131379639/ravuzowefezun.pdfIn PDF document text
    • http://zegamid.vickylneal.com/uploads/1/3/0/8/130874629/274d5c62b441.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/kigexoruriwizexekazogus.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/39086311830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1908/files/barcelona_squad_formation_2018_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/root_device_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0634/4868/files/char_broil_tru_infrared_electric_grill_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0785/3223/files/zoxibigewuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/jebajuvutobik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/adverbs_of_place_spanish_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8660/5207/files/fast_and_furious_6_full_movie_online_subtitrat_in_romana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/82592707835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/digevu.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF5 5204 bytes
SHA-256: ff48febdecf332a8193b640214d380b65646c93334111402607646db83602f39
font_01_sfnt_off00007d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7A 3260 bytes
SHA-256: b89f7c0e0160b7e0e6a9a6ef64d7cafa83ce3478fa0b609ca814a7dc393cc7e1
font_02_sfnt_off00008a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A40 3772 bytes
SHA-256: 4cd60777e265fafd80a6c4ac8a8f541642313e2b1c6670a3899fdf55b12f51bc
font_03_sfnt_off000095e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E4 9924 bytes
SHA-256: d1a702014b1a80048013fbf18012f3fac17914d2a41b97ce874065d30c078f01
font_04_sfnt_off0000b7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_05_sfnt_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 10056 bytes
SHA-256: 86c7890126aba313716b53a3922fdb884ead785454490ca4e3825fb4bc790689