Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb182ea12990cd08…

MALICIOUS

PDF

74.0 KB Created: 2021-05-26 16:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 23b00d66403ee25c17f8bc825044bc27 SHA-1: 8e9082dce4ef5a4e7bd34e45f8f83a4956fdc408 SHA-256: bb182ea12990cd08ee53627d47eac0fe4efbf6f61e6a5526d44850d8d938017c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://xezojetit.ru/strik?utm_term=how+to+copy+a+discord+server+with+xenon PDF link annotation
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/8960c2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_604aeae525815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_601a08a2b7127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5fd799a004674.pdfIn PDF document text
    • https://vowomupow.weebly.com/uploads/1/3/4/8/134846305/00123df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_60143ea8970ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485015/normal_603ecd5698a09.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/sasujivap.pdfIn PDF document text
    • https://nawogixabejuj.weebly.com/uploads/1/3/4/6/134617161/vupabizudusuwa_zikabulimatupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_6022275d63c2f.pdfIn PDF document text
    • https://bosudire.weebly.com/uploads/1/3/4/4/134456289/12af10d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_604165234070c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455916/normal_600603091da3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6017870bd4862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_5fd7b1d678ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_605fff711d484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9da2167c-a214-4b60-a1c8-309e28cc7bad/how_to_change_the_time_on_a_techno_pave_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5152cbb4-0dfb-4a8d-85eb-667ec60be2fb/10126405592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4d12c9-d50f-4ceb-a454-facaa66f67a4/kunatavisimubavenobid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2398f2-93f0-4fe6-bb47-48928309d5f8/que_es_un_bosquejo_en_matematicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bfef01-8f77-4436-966c-41e3f23cc176/is_there_romance_in_throne_of_glass_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cca6000-a17a-4c43-a836-a4bbb91762d8/buxafanonar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f07c17-bbe4-431f-a9c9-264d5c02425c/62031947330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc51d291-a7c2-4d55-8e43-190dc3bd312f/organisation_chart_of_textile_industry.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC18 5200 bytes
SHA-256: 9cc939404521358f9f950d11040ef67bc54a35f517aa72eb45d67997977301b4
font_01_sfnt_off0000ddc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC9 2844 bytes
SHA-256: 430b5b8ad7cea009a48cf66522876cae3aa72c9346b18453a82a6ca8e9aff719
font_02_sfnt_off0000e9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FA 9792 bytes
SHA-256: a9eb72c534a0be8893f2dd59b4e007773925686d29e8580255763b8ff9170eec
font_03_sfnt_off00010b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2