Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3cdb39531ed875…

MALICIOUS

PDF

87.3 KB Created: 2021-03-13 20:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 96381ff644b3ac35ba97392b04d571fd SHA-1: 20ea7d2524471f2d25b872438a2200ecd47f2786 SHA-256: 1a3cdb39531ed875e880295d78966cf714313fd2c1856f69fcbf3241fe0d24d7
76 Risk Score

Malware Insights

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

The PDF contains a high-confidence ML classification for maliciousness and features a redirector URL that appears to be part of a free-download phishing lure. The document body, though heavily obfuscated, contains text related to search queries, suggesting a social engineering pretext. No scripts were extracted, but the presence of multiple PDF-specific heuristics indicates the document is structured to exploit PDF viewers or deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://resalured.ru/strik?utm_term=what+does+the+idiom+mix+apples+and+oranges+mean PDF link annotation
    • http://baramijotafexo.mypressonline.com/nordictrack_commercial_1750_treadmill_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5fc9eb8a9f05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_6046e4a1403d2.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/what_color_represents_slavery.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/htc_m8_eye_price_in_india.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/9701287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368221/normal_5fcd9017c849e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406481/normal_60053c544894f.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/how_to_reset_a_milwaukee_m18_battery.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389586/normal_6002d3618ee22.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/28_creencias_adventistas_para_jovenes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422392/normal_6043656565ed8.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/fufajat.pdfIn PDF document text
    • http://spencermcman.us/dapumazanupuxowanowanopefl5wn7.pdfIn PDF document text
    • http://hookup754.fun/starhub_authorization_letter_templateoi8iv.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/fafijudi.pdfIn PDF document text
    • https://pinipinemijik.weebly.com/uploads/1/3/0/8/130814728/7772042.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/jofebotevupatutili.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380084/normal_5fc712e3a585a.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/59988086733.pdfIn PDF document text
    • https://xapinetevum.weebly.com/uploads/1/3/4/3/134330578/xafiwol-bulud-zirebogok-gisadiribuwox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_601299c30b269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473954/normal_60317252ee852.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5ff14413e1c43.pdfIn PDF document text
    • https://rakumimow.weebly.com/uploads/1/3/5/9/135957304/gekako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nebojemesiwi.atwebpages.com/chromosome_abnormalities.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/xorumazerugiboda.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_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 4400 bytes
SHA-256: baea921c35d3657d691e7fd91801a8c68b4a8a6e72a9d3031dd921b7cd9d3426
font_01_sfnt_off00010e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 5456 bytes
SHA-256: 79941f8d1b40677eed9ae0c5a759167f9ae939090fabcbe78601de0127d29402
font_02_sfnt_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 16004 bytes
SHA-256: 25c3ac30fb7555037cc2d58edd2606f2aa6d27e1d3240867e641e65445a0adff