Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f75a2b960eb5adf…

MALICIOUS

PDF

40.1 KB Created: 2020-10-02 10:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e9e17c0b36a4f102b9ca10abb851d6e2 SHA-1: 620eb17cdc908ac1488a8d73c0a3d4f79c77603a SHA-256: 1f75a2b960eb5adfb4fa8b2d40180da5a19eb15d8d80af408f108af2cf0c3322
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=gta+vice+city+stories+cso+ppsspp+download In PDF document text
    • http://vezab.stjohnlutherans.org/uploads/1/3/1/4/131413418/pitibu_bamof.pdfIn PDF document text
    • http://vojoko.cityoflathrop.org/uploads/1/3/1/1/131164250/detijezen_dudop_wejenaziduzeg_borige.pdfIn PDF document text
    • http://files.ccalliance.com/uploads/1/3/0/7/130739837/gidof.pdfIn PDF document text
    • http://pegadebak.ramsmachinery.com/uploads/1/3/1/8/131871787/zupijatogox_xevamepuw_fopozexefev_xutexuvun.pdfIn PDF document text
    • http://files.jenjake.com/uploads/1/3/1/4/131482832/difoxos-xofefudir.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://uploads.strikinglycdn.com/files/31ba5405-0e8a-4904-aab0-0a01ebae9efa/69087239984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d856cd-ba7a-4723-a26f-b4b1621981bf/19838995761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac475e67-8b1c-4608-86bb-644f7ffd97fa/24241015233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72af19ab-1dd2-41cc-bf03-0bbe7da23ccb/89504920326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c54002e-7e96-4220-9dfc-7c2b0198a658/bosot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50422640-9400-4138-b727-b3e1804043f9/70094675770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4c56a6-17f8-45bf-844d-a29ebf2f2275/fudefisojisalilepon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab0e7e3-7057-4af9-a999-01ecec328e77/83303828479.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
font_00_sfnt_off00005016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5016 5140 bytes
SHA-256: c51c4eab83dc0a16d0553db6b813f76d26d609a7cf9df4335d9d13720dfd1d23
font_01_sfnt_off000061bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 10420 bytes
SHA-256: 1f4193cff4c911e40365c2dfade926e5315aa0dd22852ba810685cecf83eda4a
font_02_sfnt_off0000855f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.