Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded305bf4611920a…

MALICIOUS

PDF

78.2 KB Created: 2021-04-02 01:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dd2e60c43d0e49a3537c1384312255f1 SHA-1: 9be3dce9f1e9cb21295b88756d4996a6a1d319ae SHA-256: ded305bf4611920aadfb80a24175b4a06407fb211db5f870ac2edef021f6d3c9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm with numerous external URLs, suggesting it is used for SEO manipulation or to direct users to potentially malicious sites. The presence of embedded JavaScript, although not fully analyzed due to obfuscation, further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=what+does+human+condition+mean+in+psychology PDF link annotation
    • https://kepemumud.weebly.com/uploads/1/3/1/4/131454984/gugekenapa.pdfIn PDF document text
    • http://vobajujabu.mywebcommunity.org/10th_new_syllabus_science_book_english_medium_in.pdfIn PDF document text
    • https://xifemobagot.weebly.com/uploads/1/3/4/0/134000541/eea63ffda.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/nezufadat.pdfIn PDF document text
    • https://vawovuwowoxug.weebly.com/uploads/1/3/4/0/134040368/2876075.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/maxoras.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_152e9f52582a422a8fadd4ec65ee8238.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_84053068045b463ea59f1c134eb7497f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/netflix_app_for_windows_laptop.pdfIn PDF document text
    • http://dubovusikiwafaz.epizy.com/baby_gate_with_cat_door_near_me.pdfIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_10c72ca18582411b868af772184e1e11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genijusemu/nourishing_traditions_meal_plan.pdfIn PDF document text
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_dce853debda44e67beddf5b68427c026.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_0a774716ffaf467ea268b0f36a8d71c3.pdf?index=trueIn PDF document text
    • http://ravimerafewede.epizy.com/ms_sql_sample_database.pdfIn PDF document text
    • http://gojexigubobe.epizy.com/9317678881.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_da70f00e794a4abda42e8ec8b1fe289c.pdf?index=trueIn PDF document text
    • http://gegetebipa.atwebpages.com/biology_karyotype_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/bahubali_tamil_songs_free_doregama.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_c3fd7d51690a444abdc7397e76c60d80.pdf?index=trueIn 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_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 5508 bytes
SHA-256: 5cf91ebd962d3759e0982a3a1bf6e1ce816e2564348ec15a38d0cb2875b96095
font_01_sfnt_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 11256 bytes
SHA-256: 7235c8adb094146486b410eefc3ec0bf2139e635b998c95f3a90e8a8c1849f18