Malicious PDF — malware analysis report

Static analysis result for SHA-256 232f710d7fcf8ef2…

MALICIOUS

PDF

79.7 KB Created: 2021-05-11 16:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2ed7a604cbcafd929938491d7624822d SHA-1: 6a20655923157a53640f0ce0f7867a74c97d1526 SHA-256: 232f710d7fcf8ef22f2c352edf48164ff67ee5aa6daf2f3eac7a52cb7d0f480a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to language comparison, which is likely a lure to direct users to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=which+language+is+better+chinese+or+japanese PDF link annotation
    • https://cdn.sqhk.co/kinanekoxo/oifjcPw/zaresatavabumivapixov.pdfIn PDF document text
    • https://lesejudojava.weebly.com/uploads/1/3/1/1/131164013/rulivolunukam.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/ragoxamawuvewa_funegapamufadan_fozoro_xonasale.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/hgnhbig/grid_autosport_mod_apk_android_1.pdfIn PDF document text
    • https://vizosajigu.weebly.com/uploads/1/3/1/3/131381839/boweguviwu_waxowidiwul.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/gutamidomen.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/ei6Ijh9/dovotobewesuvikupurij.pdfIn PDF document text
    • https://kujopupij.weebly.com/uploads/1/3/0/7/130740053/44b6696f1.pdfIn PDF document text
    • https://cdn.sqhk.co/nabokufawogo/cheijhi/bootstrap_4_class_form-_group.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/fasudikek/suzikenikoxagadujumopa.pdfIn PDF document text
    • http://zoletiwosi.rf.gd/45251359054.pdfIn PDF document text
    • http://fukogalijikufoz.epizy.com/rudewepew.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/idsa_guidelines_diabetic_foot_ulcer.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/american_truck_simulator_demo_kostenlos.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/9827511405.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/55759208478.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/32747802572.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/fivudoremuv.pdfIn PDF document text
    • http://gerinidud.epizy.com/lakizemebirirugar.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/how_do_you_read_a_star_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/bitcoin_mining_android_app_review.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/94034222874.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/lekipuxivopad.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/kigexafonobum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 3192 bytes
SHA-256: 2180fc33c8f5fb9fdfb8009b8d57bd3f479a98c1c5a94ca249a5e332d7f2d9ea
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 5424 bytes
SHA-256: c8d0f8596780a3bd7ae0ea6a0e8cf4524bc2455df3ad36a987c8bb6c6328f746
font_02_sfnt_off00010c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C68 10524 bytes
SHA-256: 70eced318e5c5adf78eb4fb86935fd6c9fe147568909f5601e3bc5781d028eae

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