Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfea6d1cc04262f3…

MALICIOUS

PDF

42.8 KB Created: 2020-11-05 13:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 082d41ab2548ad357abf1439871f52f4 SHA-1: e17917c623cf22f544c79cb257200082872555c8 SHA-256: dfea6d1cc04262f3563290e6bd96e9f61a3e80575a18682613d9197515f93bbe
174 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to a redirector infrastructure, specifically advertising 'official showbox apk download'. This, combined with the 'Remote-support tool lure' heuristic, suggests a phishing attempt to trick users into downloading and potentially installing malicious software or granting remote access. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ttraff.com/123?keyword=official+showbox+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5f8b5cb14dc6e.pdfIn PDF document text
    • https://novafonofijufi.weebly.com/uploads/1/3/4/4/134480525/tamumirex-suxonopafavov-rixuraxidumok-pezibetene.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/namajureponese.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/2568472.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/3f3f79fd58d.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/4877831.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/tibanepoxilibud/god_chasers_book_tommy_tenney.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/personal_pronouns_worksheet_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3432773b-b5d7-4fd8-8cf1-88a6ff284cad/fewegigapubinijig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5033/5384/files/descargar_diccionario_cambridge_pocket.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/mafamir.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/splashtop_streamer_uninstall.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/malodedi.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/chinese_alphabet_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/adjectives_worksheets_for_grade_6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 5540 bytes
SHA-256: b3e45f2d3af2803260015bafb4227b94294e1845b4d4aca294f78df13b1f0ff3
font_01_sfnt_off0000796e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 11012 bytes
SHA-256: ea8c88ff7f587f6c44a75740b5cf5cb55f68fccec38d12251668d0d167257ca7