Malicious PDF — malware analysis report

Static analysis result for SHA-256 459804780e0c0168…

MALICIOUS

PDF

77.5 KB Created: 2021-06-07 01:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 26560a186d84740048be7523bc318957 SHA-1: b52eaed2e01b88306250a7e6619ae9f4cdcfb2fa SHA-256: 459804780e0c0168ec6b5b550a684e38e9e79ce8b33463e927814382b383d346
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The primary IOC is the malicious URL hosted on 'bologen.ru', which is likely the initial lure or a component of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=purpose+driven+life+study+guide+free PDF link annotation
    • https://wugovaxovagebi.weebly.com/uploads/1/3/0/9/130969592/6083159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460465/normal_600acf35bb437.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/7845085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490272/normal_606c3a826ff79.pdfIn PDF document text
    • https://nunugaborunis.weebly.com/uploads/1/3/1/4/131437119/5108444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_6044d3535d6c5.pdfIn PDF document text
    • https://mufobaxepomek.weebly.com/uploads/1/3/4/8/134866816/javupexofavug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451756/normal_606008ca46b06.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/51d415e2-98e5-4037-84a0-c7dc32379413/juzonojekakokajekoxewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3323d3-745f-4c04-bc3c-15a48fcf7b78/movie_download_in_hindi_hd_filmywap_hollywood_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e175ceb-120b-474d-bd93-f1999017f41b/20472257705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19900765-e6df-4c99-b632-a6f3a47a9232/teneligojate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23f698f-896c-4819-8bef-cfddf9e9ccf5/part_time_technology_jobs_new_jersey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1982b0ea-7021-446b-a105-f0b36a9d469a/38375513053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b138e638-84c5-4822-a44f-b26b3933bfe4/wunomur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d998fbb-16ff-47e1-a475-e02ed4a279d8/hp_probook_4530s_drivers_base_system_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82118032-9061-4fac-b8ee-632ebc1a1c1d/advisory_council_for_occupational_health_and_safety_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0125d615-5415-4f3a-83d8-1c828724977a/1990_bass_buggy_pontoon_boat_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023d51c4-7bb7-4c20-8e5a-891007e13d40/volvo_v70_2008_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb168f6-a16e-4365-93ec-c93bc29c0da2/65101247161.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_off0000f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 5160 bytes
SHA-256: 7ff41b458d4be7c52e697cec93453d0b1d0306dec9b2e9fb0bb7d47d47945c98
font_01_sfnt_off0001020b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 11320 bytes
SHA-256: b4a14af826e0f26b7d0219542e199480a142adf74660e7e7c171277ab7dde749

Open this report in the interactive analyzer, or submit your own file for analysis.