Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa2d2d5f88e05ca…

MALICIOUS

PDF

77.0 KB Created: 2021-02-22 20:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f5d6dd0c5a9d2281b58b5de45f4f3e15 SHA-1: 8347ab4a8cb1408736fb8e9015edf87de60d810c SHA-256: 9aa2d2d5f88e05caf50b2de5a5efc7364de3baf05230f752fd2a1ed91a25707b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary external links, 'https://bologen.ru/123?utm_term=what+is+the+main+difference+between+data+verification+and+data+validation', is presented as a search result, likely to deceive users into clicking and visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=what+is+the+main+difference+between+data+verification+and+data+validation PDF link annotation
    • https://nopuxexej.weebly.com/uploads/1/3/4/4/134498230/xogafujesam.pdfIn PDF document text
    • https://pusurezifokuni.weebly.com/uploads/1/3/4/3/134317864/8858685.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/gejQihU/simple_great_battles_of_the_american_civil_war.pdfIn PDF document text
    • https://dukupifit.weebly.com/uploads/1/3/0/7/130775427/8510480.pdfIn PDF document text
    • http://vojirumabi.22web.org/vuwepaw.pdfIn PDF document text
    • https://cdn.sqhk.co/vetesomiw/igficjj/vuvexela.pdfIn PDF document text
    • https://cdn.sqhk.co/tumitibira/e5idghm/brain_training_games_free_play.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/nawuvud/carcinoma_epidermoide_cervix.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/waveform_capnography_vs_colorimetric_co2_detectors.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/bogepuka.pdfIn PDF document text
    • http://wuwedutukuw.epizy.com/52239705973.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/respironics_bipap_pro_with_bi-_flex_manual.pdfIn PDF document text
    • http://webidiwotew.epizy.com/transcribeme_exam_answers_october_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/29742021450.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/free_adirondack_chair_plans_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/zikovipelutulewez.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/remote_desktop_support_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/fizerufazanediniromupij.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/xopilofewosexu.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/diagramming_gerunds_practice_activity_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/76502087435.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/45263030390.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_off0000ee6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 5568 bytes
SHA-256: 5c416c456a8b2e9823d8fc2cf0b685662d018d197d04140e8a3f74fcbfdf07f9
font_01_sfnt_off00010149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10149 10868 bytes
SHA-256: 7b2f5b625810cfa82d783cd83eedffec2a61776d696e20546461d6543dbc2cfc

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