Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee13dbcb2c9736b9…

MALICIOUS

PDF

75.2 KB Created: 2021-04-02 18:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b32a0b06163f18a8df1d3a53649e8141 SHA-1: ed6dac18f4a9b7841f887d68dad50755c04e9adf SHA-256: ee13dbcb2c9736b978ab2a4802c9754a5afdac6cd698ed6e204bd177f3c14a6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to create a link farm or distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution.

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://lozipotod.ru/strik?utm_term=formato+para+crear+una+empresa+camara+de+comercio
    • http://gezilobogobig.22web.org/jaravuzetekaku.pdf
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/tesaganutuwupeb_puxobi_lafoxu_kuzuvaviru.pdf
    • https://sisareses.weebly.com/uploads/1/3/1/4/131454440/muweluxutevoguzis.pdf
    • https://dugufenejoropez.weebly.com/uploads/1/3/0/7/130775504/4518421.pdf
    • https://janonezofeto.weebly.com/uploads/1/3/4/6/134664798/tajanig.pdf
    • http://pakimudemezir.iblogger.org/fegekiwapo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f5efe9d0-1152-45b1-ba45-55764e2395a0/kewubumolu.pdf
    • https://s3.amazonaws.com/xoguwavosuje/safuna.pdf
    • http://zovixiluru.epizy.com/ikon_adore_you_ilkpop.pdf
    • https://uploads.strikinglycdn.com/files/2930a8e1-5781-4c9c-83a8-8f9e08625cb3/57263375884.pdf
    • https://uploads.strikinglycdn.com/files/aa18ae3e-5c8e-421d-8a71-03038c0b94e1/lg_55uj630v_refresh_rate.pdf
    • http://wilopomuba.epizy.com/goxakobotenodomumo.pdf
    • https://uploads.strikinglycdn.com/files/19bd64f8-dbcb-4723-882e-b2b924c2349c/43500064634.pdf
    • https://uploads.strikinglycdn.com/files/d54679fc-a045-4b4f-b689-2790c17d951b/72365323002.pdf
    • https://s3.amazonaws.com/sojuravewi/suzuki_bandit_400_manual_free.pdf
    • https://s3.amazonaws.com/bulikowexunepov/6559391622.pdf
    • https://s3.amazonaws.com/kafises/908784327.pdf
    • https://s3.amazonaws.com/tosego/12738527687.pdf
    • https://s3.amazonaws.com/jolunenafobuw/9660922482.pdf
    • http://mifivanotelo.rf.gd/15218015744.pdf
    • 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_off0000e775.bin
a913e99969124ea1eef3c7a8be0acbe8e1698a78d3b8e9e940947a1f9a7600ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 5140 bytes
font_01_sfnt_off0000f8d2.bin
b4817256fa0e7faf7a48311293d7469e8620062b7673872af93fb1bb2ccb0b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D2 11500 bytes

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