Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1576765162cd96d…

MALICIOUS

PDF

69.6 KB Created: 2021-04-08 00:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 26b3ce4c640cf1466e3dae2d06cffde4 SHA-1: 08d3bbc76321a17ef77ba1f4332d10552950dea0 SHA-256: b1576765162cd96d0759ccec010de3c45651f536f92c89fcb3c7a0ca4ab56022
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or scam operation. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly support a malicious classification, likely involving the redirection of users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/wix?keyword=vocab+e+unit+10+answers PDF link annotation
    • http://datinge.site/vdg_lisette_guidemg2zw.pdfIn PDF document text
    • http://pc-remont.website/plural_possessive_noun_worksheet_3rd_gradejmqcm.pdfIn PDF document text
    • http://fofafowazu.66ghz.com/62516721706.pdfIn PDF document text
    • https://roluwisotem.weebly.com/uploads/1/3/4/3/134368144/xijuvawenijakaw.pdfIn PDF document text
    • http://tryici.xyz/interview_questions_to_ask_your_potential_manager28wtf.pdfIn PDF document text
    • http://kusulapezep.iblogger.org/aeroponics_technology.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/8609922.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/EOjbyYq/vinyl_plank_flooring_cost_calculator_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/phdjfhb/85204190724.pdfIn PDF document text
    • http://all-host.site/kuvempu_university_bsc_chemistry_syllabusgptjv.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/ludabinaxegob8uzk.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/gajabedafot/pr_crisis_management_plan_template.pdfIn PDF document text
    • http://pijebikedil.epizy.com/strongs_concordance_hebrew_2023.pdfIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_b937f3d0abf34668b58d2e40579037c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/my_passport_ultra_vs_elements.pdfIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_94ff4b00052e4a17b896039923f7de87.pdf?index=trueIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_8e418107816a4a72b6535bb1a077916a.pdf?index=trueIn PDF document text
    • http://fatebem.epizy.com/oxford_dictionary_english_to_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/58317377024.pdfIn PDF document text
    • http://vafegomadi.rf.gd/acting_class_take_a_seat.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_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 5152 bytes
SHA-256: fee39cef0ebc438e4bdba49d961ba2f46cc50564acfe7fef4af30ab60e49fad6
font_01_sfnt_off0000e70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 10040 bytes
SHA-256: 1c56c134c45dddfe3f1c4c6183330a19b6042d9486c89346975e84e7d7800bde

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