Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c6cbdf95704373…

MALICIOUS

PDF

95.1 KB Created: 2021-03-15 22:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9117888bee2a98b87a0aa25584adb03a SHA-1: b071add11eb4f1df7db9584e90fa3b27c572f29a SHA-256: 15c6cbdf957043733c4c227f19229c2ddd2763ea317c3e710f15e753b62a2b20
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The document body, though heavily obfuscated, contains keywords related to a Samsung Galaxy Note 4 battery issue, suggesting a phishing or scam lure. The presence of numerous external URIs, many on disposable hosting, indicates a link farm designed to redirect users, likely to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://kuzutuzo.ru/strik?utm_term=samsung+galaxy+note+4+battery+not+holding+charge PDF link annotation
    • http://renavakurexiroz.22web.org/what_is_sagamore_plus.pdfIn PDF document text
    • http://bionatur.space/jirefikevawake072ot.pdfIn PDF document text
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/zolove-ranetul-rikakokol-suboza.pdfIn PDF document text
    • https://buwavazazaradig.weebly.com/uploads/1/3/3/9/133999961/b788e9c8af391b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_601d188cd4b38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_6002dd17c9893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_6038d392b9d8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408330/normal_5fe56aebef3fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_60003c98d3411.pdfIn PDF document text
    • http://sdfafq.info/sunbeam_electric_blanket_controlleraj6el.pdfIn PDF document text
    • http://cybety.xyz/mowomh38km.pdfIn PDF document text
    • http://gerda-msk.ru/who_made_the_moon_song22y5g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezedavepajizum.rf.gd/pitisifisirevunolafora.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/27452440332.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/81573194684.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/39826900045.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/vasovagal_syncope_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/samsung_bd-j5100_remote_not_working.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_df9bf34906d84c42a9e009c898d791de.pdf?index=trueIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_f4dac8ce765c471f8a96140fc2175ffa.pdf?index=trueIn PDF document text
    • http://fusiditato.epizy.com/joxule.pdfIn PDF document text
    • http://genaligonunik.epizy.com/6362002903.pdfIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_ce3fa93aa8b64187bc8a8cc84ab886d3.pdf?index=trueIn PDF document text
    • http://fuzimobikuxuta.epizy.com/29036897666.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_off00013392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13392 5852 bytes
SHA-256: 1f9b6236b5ca873983031bf350016a23f53dc2bc9933c6df0b629f8c1622f7eb
font_01_sfnt_off00014764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14764 10964 bytes
SHA-256: 743a5acadad2e5d5d9a3f3546940710e5ad5ac624117ca29bb68413c0ed34310

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