Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f11d06a43c2d95e…

MALICIOUS

PDF

92.8 KB Created: 2021-02-23 14:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 65f607e715b9db04fde6b0c2094a066a SHA-1: ec11eab8ff865f0166e9516d9d41e3c00684dcce SHA-256: 9f11d06a43c2d95ea84f2064c8bb38b4e4844055ce0849f940c04fb48e4e2bfd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is a link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=metamorphosis+book+quotes+with+page+numbers PDF link annotation
    • http://dmgameplan.com/break_it_down_lyrics_lil_woadiejg2g1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368497/normal_5ff7f4b690192.pdfIn PDF document text
    • http://capridigi.com/muwunefofevibekodis9im4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_6013aeb188fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_602621b0298bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483070/normal_602be73043f47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494877/normal_5ff208fdb59e6.pdfIn PDF document text
    • http://vizit.store/farmer_giles_of_ham_first_edition4f7rb.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/0d5d073cf5b57.pdfIn PDF document text
    • http://easylearning.space/dibujo_cara_de_conejo_para_colorearj1vga.pdfIn PDF document text
    • http://faxozulakevosos.iblogger.org/express_entry_canada_points_calculator_2017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xonifovozub.epizy.com/android_java_checkbox_programmatically.pdfIn PDF document text
    • http://wijetifosoxi.epizy.com/ringo_madlingozi_ndiyagodola_mp4.pdfIn PDF document text
    • http://wotawegij.rf.gd/togumetaje.pdfIn PDF document text
    • http://wamitut.epizy.com/ffxiv_drg_guide.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_off00012bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC4 5628 bytes
SHA-256: 201102c57b130a0792a4fb96f1bb4c7c7ab612fe679209a6b14df0f5a88be8a8
font_01_sfnt_off00013ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED4 11728 bytes
SHA-256: cd33ff69360cfd426ee0974dcb8794d13f5768b0c24d4ee46a2ee221a98aeb4a

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