Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c01912de6b0d3f…

MALICIOUS

PDF

79.2 KB Created: 2021-05-30 23:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2b19dde2c880e0db79d889baad89cc6a SHA-1: cbc68365fab519dfcf9ca1a393479ff5ac8e7879 SHA-256: 48c01912de6b0d3f7fd07bce126338390d00582dbebd2d0ef4354971473bd787
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though partially corrupted, suggests a lure related to literary allusions, directing users to potentially malicious external sites like 'bologen.ru'. No scripts were extracted, but the presence of many external links points towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=what+are+some+examples+of+literary+allusion PDF link annotation
    • https://nurowilalivep.weebly.com/uploads/1/3/1/3/131380447/xumolaxamuda-veripagazojiz-muwidam-mukibu.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/55283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_6047dae61171e.pdfIn PDF document text
    • https://xapiwelawuk.weebly.com/uploads/1/3/5/3/135341488/628db60ef6d.pdfIn PDF document text
    • https://revegeworosopo.weebly.com/uploads/1/3/1/6/131637057/05591d22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_6023fb70a7dd4.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/490473de-fc61-4c9f-b2b8-34f017239c96/53968382405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c370c3-1221-4fb5-b0d6-37a3656849fb/storm_front_audiobook_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1169ca1d-67bc-4199-aef7-5f57bf441b25/boxugejujovuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f1b0ad-125d-4b78-829b-5248611abf00/falufexot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5dddf7d-9c07-4b23-b725-0ac24efd8e3a/how_to_build_triceps_with_resistance_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28072384-c941-4a40-93b7-e29b3c7c28d8/1986_prices_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d027b8-d62e-4f6e-afd8-62afad087d75/6085981473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed66968-0bb6-4bff-862c-fdcc6ad8d086/alesis_dm10_mkii_pro_drum_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f385500f-e908-4d72-b690-71475bee2662/graphic_designer_salary_in_malaysia_per_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507c8b57-0ef2-42c1-9c62-6cc331cb3220/51950043118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a139ccef-9eb7-4147-9e58-94ad0dcb03af/4293073429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cefa38e8-83b4-4fe9-b5fa-f5d509da844b/wait_to_be_seated_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c220d306-7a2b-4b92-9543-d95efe9acc22/meaning_of_dbt_in_cibil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775e1bf2-adb6-4cd8-8ce9-464f530e984a/42764324542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc7e832-fe7c-4b70-a95c-dc1ce2e71235/maschine_mikro_mk2_ableton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b53a37-3191-45c8-8561-687c9b987557/ejemplos_de_convertir_decimal_a_fraccion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 5204 bytes
SHA-256: 0007c4b6338b998c90b0170c8ffcd04391236bbaa437d15af1fe97a11b523626
font_01_sfnt_off0000fcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEF 10464 bytes
SHA-256: b50071765f03d79d815860b3d738bcafbd8e4b91c3c1ad2ec2dbda9f7d9cc672
font_02_sfnt_off000120b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c