Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15f5e0169e4b7f5…

MALICIOUS

PDF

74.2 KB Created: 2021-06-13 18:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7fa6a1ebfea842490ffdce947ac9b05a SHA-1: b416fc5930646145e9a416724550803f7358d889 SHA-256: d15f5e0169e4b7f5676525126289538ed449da2d0ff9760376eaf0779976a4b8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/pbw?utm_term=animals+name+list+in+english+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393359/normal_5fef348dd1c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_60bf377766728.pdfIn PDF document text
    • https://tumotasefon.weebly.com/uploads/1/3/5/3/135317172/tuxadifizot.pdfIn PDF document text
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/lurizubivedobes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_60c123c71fab1.pdfIn PDF document text
    • https://tatosemivuzufik.weebly.com/uploads/1/3/4/5/134599987/tovumilovaduju-jugus.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/962e94bc-bad1-404a-9dca-4856d418b90c/why_not_afraid_of_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8873599-df1a-4635-b20e-bb461e40318b/29190277370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be559efa-a794-4d28-97b0-e55439fac2bd/aprilia_rsv4_review_2020.pdfIn PDF document text
    • http://depowota.pbworks.com/w/file/fetch/144852045/hierarchical_cluster_analysis_sample_size.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/144574911/83317071885.pdfIn PDF document text
    • http://natetusiwuwo.pbworks.com/w/file/fetch/145193652/genius_bollywood_full_movie_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29082aba-1e12-4bb1-a937-440d607e31dd/65959199908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fbe38e6-775e-4468-b7f5-6fc5495e6b0f/plantronic_voyager_legend_review.pdfIn PDF document text
    • http://munonoraze.pbworks.com/f/silitikividanepuzidut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dcb8114-6b30-4572-9c0f-cc521ce11c6e/xuwopozexikojugovag.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144573006/46676226835.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_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 5348 bytes
SHA-256: 430193630b27153a5aea298a7af74277e3d17a3a0795d782dfa10509df8f945c
font_01_sfnt_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 10672 bytes
SHA-256: 9977291d93fb5362a7d38dca2bda27c4aedfd43f6a19e9b37d93bad23ca814d9

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