Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be37280fc1fde38…

MALICIOUS

PDF

64.7 KB Created: 2020-11-18 17:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 45278a8880d0a5d2dc41eb3ab4aaa851 SHA-1: 5907cf0425907b34b989d602c5fa1b13510c280d SHA-256: 8be37280fc1fde386ec3d57236f0aaabb3cf0b0bce8abc9e13a7ea11fdb57483
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful sites. No scripts were extracted, but the presence of multiple external links strongly suggests a phishing or 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=cleric+character+sheet In PDF document text
    • https://dotifusogibosu.weebly.com/uploads/1/3/4/4/134458831/sinusi_bebukupelote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5f9bc3c036b3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5f98aa85de1e9.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/duposikuziwoniziwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f9566223a0e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f973d37dd633.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/ziwuvijevo/examining_the_fossil_record_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f358cbac-4f99-4f0e-ae8d-5be112e47ac8/24784003675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78562690-5ad3-4d35-965e-b70030feffc4/giwimukomipekitele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826f221d-1313-4495-b492-47145a54ef10/4_letter_word_that_start_with_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d99e70-ac29-47df-979d-67851f97651f/xubunujakej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824aa5fb-bff8-41c3-aae1-04ec4f9e0a48/lireboxoruzijegejuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1877a317-57f0-411a-91a0-d8db77f2fe85/81224907639.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_off0000bed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED7 4792 bytes
SHA-256: 9dd2788fed0e6634edd48ea7e2c2402bc7205afa42562d2bf52dd262a6eac233
font_01_sfnt_off0000cf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0D 12164 bytes
SHA-256: 58c386516faa5b4276dba0de094193e20f3de06f0c44240c25ac338341a021cc

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