Malicious PDF — malware analysis report

Static analysis result for SHA-256 c272ce49225b23fd…

MALICIOUS

PDF

82.1 KB Created: 2021-03-26 08:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1b95152197c454dc6e3b5c4b7e4062a4 SHA-1: 1ab0f7526320ca8afaafad7eb9459b5e703e94a7 SHA-256: c272ce49225b23fd52455c534f98a74932050d98a9a6129a64fdaee49d65eb0f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://maypoin.ru/strik?utm_term=does+stanford+need+sat+subject+tests PDF link annotation
    • https://cdn.sqhk.co/duwewofowus/idogMhb/28208175051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_6034333ea8000.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/jajizenop.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/5314593.pdfIn PDF document text
    • https://konoxitewe.weebly.com/uploads/1/3/4/4/134494736/1283130.pdfIn PDF document text
    • http://rovepofaji.22web.org/857893103.pdfIn PDF document text
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/4895816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_605717b980cf5.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/6682533611.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/nokitebetigerino.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepunebo.epizy.com/liriwad.pdfIn PDF document text
    • http://kexetevil.epizy.com/how_to_put_frigidaire_affinity_washer_in_diagnostic_mode.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/capela_sixtina_a_ortodoxiei_romanesti.pdfIn PDF document text
    • http://padebujabofud.rf.gd/7920158955.pdfIn PDF document text
    • http://folenawoxoguli.rf.gd/53803388088.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 5200 bytes
SHA-256: 8905d22c2558202d0bc1a860b53328b4b491e01ffaa67780c06625de4edd4bf4
font_01_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 10728 bytes
SHA-256: 0c2854f6e06c6ff2ce1403dc02ad0dd45ba808243914c416069d5d71793ca6c8
font_02_sfnt_off00012605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12605 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d

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