Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82eb295741215ac…

MALICIOUS

PDF

77.9 KB Created: 2021-03-15 23:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 07a41014826c35a710e79c20094074fa SHA-1: 4568875a8d572e8f72e0201d36236186cf833a1d SHA-256: a82eb295741215ac3f5ef135f93ac8e6864c2b3daaadaa193959e6f290edbaea
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one primary malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, suggests a lure related to 'Skechers black friday south africa', likely to drive traffic to the malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=skechers+black+friday+south+africa PDF link annotation
    • http://rimawebonozavi.iblogger.org/72582551606.pdfIn PDF document text
    • http://mosemajubuj.22web.org/ditton_primary_school_ofsted_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_6014a2d487dbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_604935228d5c6.pdfIn PDF document text
    • http://rozefuzapotor.iblogger.org/48377530464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60159c5a44041.pdfIn PDF document text
    • https://gixebufenof.weebly.com/uploads/1/3/6/0/136082423/713d8c5.pdfIn PDF document text
    • https://miremawa.weebly.com/uploads/1/3/4/6/134631892/lunalogup.pdfIn PDF document text
    • http://pusokum.66ghz.com/green_screen_software_free.pdfIn PDF document text
    • http://silofabinewu.22web.org/mihai_barbulescu_istoria_romaniei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446259/normal_5ffd3c022b1d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2b7e39-997d-4e9f-abdc-64e2736f2485/zip_code_houston_texas_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/whatsapp_apk_install_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32bed7e8-981c-411d-833b-02242f1b5e14/nursing_teas_guide_quick_study_academic_1st_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f3a4a8-7efb-4925-9fd4-ba2021129413/asus_q502la-bbi5t12_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29434c90-4b5c-41b0-a7ba-35268ae789ba/ladizekixiwusekigomu.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/11188444812.pdfIn PDF document text
    • http://baniteb.epizy.com/92034807897.pdfIn PDF document text
    • http://xazerusovugidu.epizy.com/linear_algebra_friedberg_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/how_much_money_does_a_computer_network_architect_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7cbb28-726a-4e06-89fd-6d6e43c444a4/xedanizowudefosusat.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/liviwavudo.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/how_long_is_16_cm_in_inches.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_off0000f1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 5516 bytes
SHA-256: edd57f6276667d59e9bc50c5419367557768964361baf172feb075060fb61fbc
font_01_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10520 bytes
SHA-256: 087b8dd461c08db3f4f29148fcb21017bc2807d3016d15650c1028431838b871