Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d008a50dda58af…

MALICIOUS

PDF

43.5 KB Created: 2020-11-02 05:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ef1dbb75d782cd4b88a0da450dcda032 SHA-1: b3963e7194d4451fdc61c74a64a52b663fce69ed SHA-256: b0d008a50dda58aff428f0e10a80082ce10973a57219c97cde72fc2caf3e4b02
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'elevens lab answers key'. This suggests a phishing attempt to redirect users to malicious content. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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 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.
  • 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.club/123?keyword=elevens+lab+answers+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f991aa047211.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/gitimowa_kagufaborupo_vugetexusodilo.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/fazebumuxozamez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5f91ec266647a.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/rumurikokar-zejebow-pomudopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f879c36aa186.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/malewiwikekazutuwid.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/jofunozuzof/rixiwuwixalevetozadepo.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bitter_lemons_of_cyprus.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/rolugovobafubema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/stepper_motor_arduino.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/vuvojidesixoda.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/scaled_fist_monk_build_pathfinder_kingmaker.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/39321429734.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/windsor_gun_club.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_off0000685b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685B 5092 bytes
SHA-256: 250b421e58c4db75c248419529c4cf6051a0cb21faa11266bbb5f736eb5046ad
font_01_sfnt_off000079da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79DA 11636 bytes
SHA-256: 4afc6407295cc882c27f6d93277349a9abd198524214355ca686970e5c0c874d

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