Malicious PDF — malware analysis report

Static analysis result for SHA-256 13bbe1b12de8b8fd…

MALICIOUS

PDF

73.0 KB Created: 2021-04-25 00:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 64d47a40c699b93f88da473bbc98b51a SHA-1: 20fafdac679590b372b857a76b67f5e92a866f2b SHA-256: 13bbe1b12de8b8fd825d1146935c9d8b9fcb9ffff6731d991acb001075cd4d13
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is 'https://bologen.ru/strik?utm_term=most+accurate+free+online+mbti+test', which is likely used to redirect users to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=most+accurate+free+online+mbti+test PDF link annotation
    • http://jeruwit.mygamesonline.org/muveloxumubaxu.pdfIn PDF document text
    • http://bulubuzigajuzar.getenjoyment.net/nivosevogiwekamusatimupo.pdfIn PDF document text
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/83369d462e1.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/38222958911.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/fcbe59ab504024.pdfIn PDF document text
    • https://gaxepofujar.weebly.com/uploads/1/3/5/3/135348048/rikiruxetididuv_xixezinexonapo_kidemadul.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/dosalapasenow/formasi_cpns_provinsi_papua_barat_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/56795947651.pdfIn PDF document text
    • https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_1359661cd9744de487c691acdd825994.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/rising_of_the_shield_hero_anime_vs_light_novel.pdfIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_0ad9547a553e44de97554c73b91b3eeb.pdf?index=trueIn PDF document text
    • http://lifobem.myartsonline.com/carrier_ethernet_2._0.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/matrix_word_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/picsart_free_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/nivumerunorajolekiwipaxud.pdfIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_f77bb7a6b1884fc3a153f2f82e3ff1b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/self_defense_classes_for_adults_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/1682736971.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/date_format_function_in_ms_sql_server.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/resumen_del_libro_un_puente_hacia_terabithia.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_off0000e073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE073 5172 bytes
SHA-256: 3083d36275bcb7dc6a2b0341e5b798d77fdad066b4cb7d68494f46adb78bd795
font_01_sfnt_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 10800 bytes
SHA-256: cb78b5d1c9d09de1f9c74a6798e62c4b9ba61e8cc4716438cb1785ab3ad04d3d

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