Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b473d956754b93…

MALICIOUS

PDF

73.1 KB Created: 2021-02-05 05:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7a476e5078495931de87f027f3ef7106 SHA-1: 42a0c3e8918a1c9de39d373ccd03b3967b83cb5d SHA-256: 34b473d956754b93600f9ddbd046a472a3bf83fe7812fc7dfba5db9094c17965
184 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to financial templates. The presence of multiple disposable domains and link farms points towards a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=apple+numbers+income+statement+template In PDF document text
    • https://static.s123-cdn-static.com/uploads/4471083/normal_5ffac535a46f5.pdfIn PDF document text
    • http://normal-id.com/lejixogodijekolemavh3gxk.pdfIn PDF document text
    • http://instasurprise.online/95405661436fyovg.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/PjaAha4/vojema.pdfIn PDF document text
    • https://cdn.sqhk.co/jozanafe/DMhiifA/33814132353.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/jgLhd6V/my_rental_girlfriend_mod_apk.pdfIn PDF document text
    • http://comp-arenda.site/verbs_list_with_hindi_meaning_freexviup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389824/normal_5fec7e99e0eed.pdfIn PDF document text
    • http://de-bewertung-889562.icu/bidovinoroxapezifowakog4qmx.pdfIn PDF document text
    • http://bred-enligne.com/66514026279bhm9d.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/jiZmCcR/24593282775.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389570/normal_5fca9c707cb47.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://zidegegizuvodin.epizy.com/ecdc_measles_report.pdfIn PDF document text
    • http://zatozegajuzu.epizy.com/wulavol.pdfIn PDF document text
    • http://sivuvupaxiju.rf.gd/sewapa.pdfIn PDF document text
    • http://kadekosaraf.epizy.com/9-_7_practice_equations_of_circles_answers.pdfIn PDF document text
    • http://pumifobivo.epizy.com/luranupox.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_off0000d33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33B 5088 bytes
SHA-256: 8938e99b11698d469bd269a4fb8206ab1c5dea43e8a7082de711f286fc95676e
font_01_sfnt_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 10716 bytes
SHA-256: 17d13c8390b4b2229a44a18e7aba05596c8ced8d0a92a1e8237aaa046bc4de56
font_02_sfnt_off00010901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10901 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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