Malicious PDF — malware analysis report

Static analysis result for SHA-256 9552e416e2451960…

MALICIOUS

PDF

72.0 KB Created: 2021-03-09 05:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7badc03d796752d4f272dc4c1b80d881 SHA-1: b127df62c1182fd9c4f4099fee7de5207e37974c SHA-256: 9552e416e2451960aa9ecc9d26ba110212aaf1550785494448b3d8b85461d509
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of a URL like 'https://fokemale.ru/wix?keyword=kingdom+hearts+3+android+apk' indicates a possible phishing or scam attempt, leveraging keywords to attract clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://fokemale.ru/wix?keyword=kingdom+hearts+3+android+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446921/normal_5fe65f4959d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_604352d4a20b4.pdfIn PDF document text
    • http://cozyplacefor.rest/zepitmm7tl.pdfIn PDF document text
    • http://stopnutristrike.ru/tavulagerinerajudivopz2w7.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/willhi_temperature_controller_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fd2893b821a8.pdfIn PDF document text
    • http://topcreditreport.info/what_is_visual_culture_mirzoeffoepj8.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/how_to_apply_adore_semi_permanent_color.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_60181158b76ed.pdfIn PDF document text
    • http://nout-sale.site/why_we_cant_wait_audiobookao54q.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/45084950135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6040eb9b9a25d.pdfIn PDF document text
    • http://senteber.site/nanatsu_no_taizai_ova_en_la_playa_sub_espaolpp6bh.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/what_is_the_point_of_the_book_of_daniel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_603bae0a6be10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_601e514234a1f.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/pewibim/43229858515.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/poetry_comprehension_for_grade_8_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/24301358408.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_c1d21e3cac3f471f9c45d29229d9ce42.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_9448506ea1db4756ab776b02f0723e28.pdf?index=trueIn PDF document text
    • http://fabevax.myartsonline.com/kawatapedeki.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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 5540 bytes
SHA-256: 7c450b98a4b7de25410fa4b19c6a72822e19197bc49f2dccb99f727741d80a66
font_01_sfnt_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 10756 bytes
SHA-256: a3ed95b5ad5b1fa44739e5240e1f2578cbdc960692149c6b91211d9555afd31f