Malicious PDF — malware analysis report

Static analysis result for SHA-256 160a8041a312f01f…

MALICIOUS

PDF

128.7 KB Created: 2021-02-18 09:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8e7dd7948e6fdff2da368fe5008e898a SHA-1: 054f95b8322962897131618f664b5faa6967c431 SHA-256: 160a8041a312f01f3d12679f991f1cd488d982992122da4a9717a81511d8e136
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like nature. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary URLs identified is 'https://leonvi.ru/strik?utm_term=tokyo+ghoul+seasons+list', which is likely the intended destination for users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=tokyo+ghoul+seasons+list PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489411/normal_5fc6d45beb18b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_6023b59db960b.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/difalisek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_601c5e60e48f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_600fd9de11c8b.pdfIn PDF document text
    • http://gunaborekigefu.22web.org/egalite_for_all_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367923/normal_60028ade82862.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/8433180.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/doweva.pdfIn PDF document text
    • http://lovunusugi.22web.org/hospice_vs_palliative_care.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bufexa/cae_exam_practice_tests_free.pdfIn PDF document text
    • http://fitizoluwa.epizy.com/blastoid_transformation_of_lymphoma.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/adonisjs_vs_express_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/apple_clipart_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/antony_and_cleopatra_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/dirt_bike_front_brake_line_guide.pdfIn PDF document text
    • http://finesegugumemo.epizy.com/wefexobuviwi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C5 43728 bytes
SHA-256: 78bb53c8b505e780b5b03cca733629ed595b6bd18381916f4fa678da914ffc18
font_01_sfnt_off0001ba3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA3E 4964 bytes
SHA-256: 759b1d78021728f82399d84de6be2f22c73274dd34499ee47e69394694c7c4f1
font_02_sfnt_off0001cb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB33 13676 bytes
SHA-256: 53699c7c8330fed463724ed240128c2be169544b482f97c5e26de9f224268ad6

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