Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9028afd8c9ca91…

MALICIOUS

PDF

91.8 KB Created: 2021-03-21 02:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ac7aab4e1dac738fd4a9fa04f9396f47 SHA-1: 0c75447d4644331a685a52db213e96c3cdbeec5d SHA-256: 9f9028afd8c9ca918e09b97c03496a44c6ce432192bb0a6ad9321fc8801d5374
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a mass of external links, indicating it functions as a link farm. The embedded URLs suggest a phishing or spamming campaign, likely designed to drive traffic to potentially malicious or ad-filled websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://ponafet.ru/wix?keyword=third+person+subjective+narrator+definition PDF link annotation
    • https://jitogomufe.weebly.com/uploads/1/3/4/5/134588764/77b0e7d4afbaa32.pdfIn PDF document text
    • https://fepagefifumowa.weebly.com/uploads/1/3/2/6/132681901/6034995.pdfIn PDF document text
    • https://zuzameponotu.weebly.com/uploads/1/3/1/6/131606203/topubakuder.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/54c7b7e.pdfIn PDF document text
    • https://dudobafileziv.weebly.com/uploads/1/3/5/3/135331993/zuzozoxagerelogiv.pdfIn PDF document text
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/sukoz.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxezitowefi/cjhWMrI/revomumekaw.pdfIn PDF document text
    • https://metozalolak.weebly.com/uploads/1/3/4/6/134610510/4462686.pdfIn PDF document text
    • https://gefozusep.weebly.com/uploads/1/3/5/3/135346228/1128163.pdfIn PDF document text
    • https://cdn.sqhk.co/torevebeti/hjid8Vt/football_manager_2020_touch_android_review.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/2100564.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/d0iTujd/pa_game_commission_hunting_license_purchase.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/bbd9cb17-b74e-447e-8280-81917c6c0b1a/venelodanoxelomofuz.pdfIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_ac7860599b204cd3857c2058a7047869.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/11863ee4-ab10-454c-a0e8-e8bd37ea1d7f/how_do_i_apply_for_a_job_at_lowes.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_61cc166b164c4e4a80e7b0a5e4a3a0da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a1e046-89b0-45e9-864f-86f629492732/mortal_instruments_film_vs_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442f7148-8a57-4d6c-8556-05b97ab748bd/69019514935.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 5436 bytes
SHA-256: cd93f6e41074389b817a051920ba9de3d1cd20cb4d6a5145908a84246817c311
font_01_sfnt_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 1800 bytes
SHA-256: a107e322bcd633a2304c0b450800fe683a09a45e455a4dbf1d4e7cb59ef2fa8b
font_02_sfnt_off0001256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 10988 bytes
SHA-256: bf67584c5140131b6d8f5e72b64d3695c3dc500596ed3042fa807d7bcaf28699
font_03_sfnt_off00014af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF4 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940