Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b5355b0c9a5d40…

MALICIOUS

PDF

82.4 KB Created: 2021-05-18 00:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9f0ed35f944dc4a35ac15db6bd72e4a1 SHA-1: 88dd7321ad81172d15820ae5becb6276d66925e9 SHA-256: 72b5355b0c9a5d400d1996fa3feccd0003f10367d514603186072b62085d1cf8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious campaign, likely involving a phishing lure to a website.

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://resalured.ru/strik?utm_term=5+heridas+emocionales+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5ffd7c375e4c1.pdfIn PDF document text
    • https://pefeluleno.weebly.com/uploads/1/3/4/6/134698673/bosejofakezar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482190/normal_5ff8965dba708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388598/normal_5fe3b00074917.pdfIn PDF document text
    • https://delitulasuv.weebly.com/uploads/1/3/0/7/130775658/1350948.pdfIn PDF document text
    • https://mepaxekedin.weebly.com/uploads/1/3/4/5/134514716/zebegewegigalil.pdfIn PDF document text
    • http://lunamawel.22web.org/kofanosigolisakilo.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/barbie_movie_naa_songs.pdfIn PDF document text
    • https://mosofekux.weebly.com/uploads/1/3/1/4/131437457/bafiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_6034c189e6beb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fc5eacb201d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5fec15e98435b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_60543e4caf9ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_606103681c669.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/be1ab691de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458390/normal_6047a696679bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fd0847707097.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vepesupilet.epizy.com/52802596547.pdfIn PDF document text
    • http://gelonixaj.rf.gd/migusuwelezet.pdfIn PDF document text
    • http://varaxekewuveza.epizy.com/install_photoshop_brushes_free.pdfIn PDF document text
    • http://kilirafesiva.epizy.com/assignment_letter_sample.pdfIn PDF document text
    • http://bugigumu.epizy.com/samsung_note_20_plus_price_in_uae.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69E 5132 bytes
SHA-256: fe50189bbc9af728d489d1a3b4d9e12bdfeb9ce0fa07d0284f8bdeb266a0fe7a
font_01_sfnt_off000107e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E0 11244 bytes
SHA-256: 4a723006029472cb37487fcb56e57e0d49b2afaec011c35c20b205cb8974dbde
font_02_sfnt_off00012bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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