Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2af128466d430f…

MALICIOUS

PDF

77.2 KB Created: 2021-02-05 10:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 458e8b79cbcbdc09d740da85663bbd8c SHA-1: 93dfcd8987a31fc87e4de9453a071ec5056c6efa SHA-256: 2f2af128466d430f56c8bf60f42837ed87534f1d693f011587303ceb58709976
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The ML classifier strongly indicated maliciousness, and an external URI was detected pointing to 'jottigo.ru'. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a potentially malicious site. The document body contains garbled text, indicating it is not intended for human readability but rather as a container for malicious elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/123?utm_term=exp+share+emerald+location PDF link annotation
    • https://cdn.sqhk.co/sewadokoka/yhejcig/old_time_gospel_songs_videos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_5ff7d4acc5631.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/ggchXji/gartner_duct_cyst_natural_treatment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fd1d0a8b0514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_601b183721901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_6019cda8efe2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5ffe5b313f5b0.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/ftIrthb/52525302780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380871/normal_5ff70cfdd5b23.pdfIn PDF document text
    • http://sodahq.club/angel_of_mine_monicabx0qf.pdfIn PDF document text
    • http://torchland.xyz/44502973987mokcf.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/6PjgjiP/82618702095.pdfIn PDF document text
    • http://hookup671.site/calotropis_procera_morphology9xcwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367005/normal_5ff2a47776653.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/wiremeresegikon/find_duplicate_entries_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/kvb_new_atm_card_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/27699378649.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/file_folder_design_template.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_off0000d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD801 5100 bytes
SHA-256: 565dddb4f28fae7b942f8a7c87d745f0d11f6584fd0e27c230f89be9b69f83f7
font_01_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 5340 bytes
SHA-256: f7e423aa983fa231433b2fbd98c3b4582adbce4e6cbef6f7a873285e7473f0fe
font_02_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 13256 bytes
SHA-256: c8fca7e1283e90ade6923d540da94b6d504488d5546af39247f2021227957dbd

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