Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdef7218e4815ac1…

MALICIOUS

PDF

61.8 KB Created: 2020-12-15 07:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 624541862b4ec24c189a103c0330636d SHA-1: 76b5ef8bd2e7cd268334389890cd6bc6c387fd74 SHA-256: cdef7218e4815ac1bc4426b4a532c97357cd9c8e343592b1c2623e32882d1a98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, many pointing to Weebly-hosted files, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

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://traffnew.ru/123?utm_term=cheap+graph+paper+composition+notebook PDF link annotation
    • https://kovumagamu.weebly.com/uploads/1/3/4/5/134578336/tebadi.pdfIn PDF document text
    • https://selisibukexapa.weebly.com/uploads/1/3/4/3/134317440/finisose.pdfIn PDF document text
    • https://nigikejogu.weebly.com/uploads/1/3/4/9/134902550/xobifogikelepo_tukanewot_kokajamufo_wukopenagejid.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/lujenipibub_guvagafu_zeberenonaboj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_5fb3e276e755a.pdfIn PDF document text
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/zenokunonivaj.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/lodazojamuva/autocad_2016_patch_free.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/shogun_japanese_steakhouse_lunch_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/reddit_is_apkmirror_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/this_call_may_be_recorded_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0169d5bb-5d50-42f5-949b-165417e930b5/south_florida_national_cemetery_memorial_day.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_off0000b268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB268 5424 bytes
SHA-256: 17ca3419b445d5065b2016246863ab80cd22f169b362fbf23f3a311833c423ec
font_01_sfnt_off0000c4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AE 10996 bytes
SHA-256: 18358abe924e72107238872c3979b7422f8cfda3ee571e417e37c0aaf85aec6e

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