Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39f1e18aadbc6a8…

MALICIOUS

PDF

54.7 KB Created: 2020-11-03 16:38:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7d7533c5a1b3f0dbea64eb088dc6e440 SHA-1: c44b292ff09d0c00f9292d0ab03e7c70fb43e4d3 SHA-256: e39f1e18aadbc6a801a5c89a4813a5b5fea8a85b7659514486f832c8fd32013f
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=tangle%20free%20brush%20reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f87b39bc43fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_5f918078c0499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8a60e7236ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f8bab584ea40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5f9de7a2dbb35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f88f18fd724a.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/zetare/fovuwez.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/87214220989.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/lolubupiluvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d78272-2fa5-4584-ac3c-8a1fb4fbab9e/83612741193.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/autocad_civil_3d_2018_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589b1798-7a8d-42a9-817c-b29d94567123/2773092922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bafd09f-eba7-407a-b9dd-76cbb81f53c6/gibewipatev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac16883-350d-444e-982a-646f0aa2395c/revised_dyadic_adjustment_scale_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fe956d-b919-409f-935c-c2a87fb19157/81733172044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604aa797-b2a9-4e73-a075-ee5eeb255adc/12793572110.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/paulo_coelho_el_alquimista_gratis.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5652 6588 bytes
SHA-256: 24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79
font_01_sfnt_off000066cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 5272 bytes
SHA-256: 9358d3e4d440097afd5c980efee43ca62f4ba4fc9efd9134ddd3e80cd089bf81
font_02_sfnt_off000078c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 4772 bytes
SHA-256: 94d439835c32c82119e0f1a233d9e4843465a2e7ccaed64f8c4ad8d26b536cbb
font_03_sfnt_off000085f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 10968 bytes
SHA-256: 8779d85abadd21962d1447f16158846f61339dec12f1ba42b8589f6d08ea14be
font_04_sfnt_off0000abab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABAB 17388 bytes
SHA-256: 446e61e4fcc4112783806e7f3e29add9f6e13c05298bdd616d29e2ca93273542
font_05_sfnt_off0000c49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49B 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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