Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe8d7ee0b15d439…

MALICIOUS

PDF

96.9 KB Created: 2020-10-05 05:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dcd71063937839dd6225ce710f9ceaae SHA-1: a9c631168d32fc5042a626d248a40fb934d9a4bb SHA-256: abe8d7ee0b15d4396855afe4c62d75c28abee3c8350980a42128d11ac2eed7c5
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially obfuscated, contains text related to 'Inuyasha naraku episodes' and the authoring application, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious activity.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/pify?keyword=inuyasha+naraku+episodes In PDF document text
    • http://pomova.kitchenettecuisine.com/uploads/1/3/1/8/131856005/627316.pdfIn PDF document text
    • http://jobowudig.verplanckfire.org/uploads/1/3/1/6/131637024/rasuzagoluwoku.pdfIn PDF document text
    • http://kimunet.wendellresearchgroup.com/uploads/1/3/1/4/131454165/9364489.pdfIn PDF document text
    • http://files.leenaceraveeni.com/uploads/1/3/1/3/131398379/7418295.pdfIn PDF document text
    • http://dogobefad.gabrielaportland.org/uploads/1/3/0/7/130776241/eeb4fbfd30d5.pdfIn PDF document text
    • https://site-1039896.mozfiles.com/files/1039896/paxanujebusofajefuzawola.pdfIn PDF document text
    • https://site-1039224.mozfiles.com/files/1039224/lebuvavazopipabopawo.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/8335813422.pdfIn PDF document text
    • https://site-1042832.mozfiles.com/files/1042832/73628767287.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a428ba-ecd0-4947-a798-d58ce85478f2/37928579020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5532fdb-2e89-4acc-a100-2e11b79e3e02/43449193183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b866e788-95b9-4275-9729-381fd0a77477/236062252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39eb2dfe-2c15-466c-90d8-badf492f23ed/dinokogagepakex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f441f08-1839-424d-a855-6c05b097d7bb/ridadakidoxofeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01dba726-330e-4e01-8d5d-560c9b2aafa6/gipikaxeturaxusule.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000a00f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA00F 53040 bytes
SHA-256: 7f58af8353a150450f1e0fe15bebff7622cf2eba2beb2a1c6ae65a8203719f51
font_01_sfnt_off00014217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14217 5120 bytes
SHA-256: 898058d79cd1a5601b8969b712d7224381d2aaa435fa16def78c8a61ab3aa6ed
font_02_sfnt_off00015383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15383 10120 bytes
SHA-256: 7587784eaf570f0271bed264f8cca1d69ad594540cf161fc846ddc9152ce7bbb

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