Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfe1e18cfe153e9…

MALICIOUS

PDF

139.4 KB Created: 2021-03-21 03:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebec860b4dadcf126140631fb0027543 SHA-1: 474ff1cd2abfd3ad01b75198d593b2c44a72fbac SHA-256: dcfe1e18cfe153e9878a643129b2d38de138b049e6840d99589b049f46030216
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF being flagged as a phishing trojan. The embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=the+chronicles+of+narnia+the+lion+the+witch+and+the+wardrobe+book+pages
    • https://fodumalape.weebly.com/uploads/1/3/2/6/132695584/pudaso.pdf
    • https://fenitejum.weebly.com/uploads/1/3/2/3/132302819/9903058.pdf
    • http://test123test.xyz/car_driving_games_for_pc_free_downloadwcxev.pdf
    • https://dunewalowipeli.weebly.com/uploads/1/3/1/8/131856746/bukotebiz-suwonuzosizenox.pdf
    • http://antonioit.space/what_are_the_symptoms_of_covid-19_pandemicukzmm.pdf
    • https://rogebupapopax.weebly.com/uploads/1/3/0/7/130739826/lajosufejujur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_b05422354cba400c94accc1a52f54523.pdf?index=true
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_1dfe8ca789534f1b9f74a22983c0de3f.pdf?index=true
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_45f83a3e49974107991b6075676ef86a.pdf?index=true
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_a896abc587554fbda880a7eee05c8193.pdf?index=true
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_c653381c98e3428cb0de6e1762899b23.pdf?index=true
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_4abe7c8af1aa4453801ddf89524381c2.pdf?index=true
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_99eff21ed7d24fef82e97f452916a2dc.pdf?index=true
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_bf2d336a72114258b5eb39746c08c84b.pdf?index=true
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_da9b6d91053748ee8644eab97d9001ce.pdf?index=true
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_41013628bcde47448617034895a01a32.pdf?index=true
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_551ed09a3a634c96bfa403d3aaac6c9a.pdf?index=true
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_f0d758f1cacc4113aed8da99cdc27bf5.pdf?index=true
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_7447e41ce2d240d0997599a55e044f74.pdf?index=true
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_36c72ebdd960415f803688a2c53b862f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e682.bin
3b1655905d613e86deef47874783b91175da4f66737ab3ac7934e7e29950ebbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E682 5660 bytes
font_01_sfnt_off0001f9ce.bin
d2b281fa29cce4a00127b528f44e11e4bc6eaac791e4a9856a1b1bc9e3cea260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9CE 11256 bytes

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