Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1044ac6af9ddb22…

MALICIOUS

PDF

69.2 KB Created: 2021-02-06 20:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8cec7a88b656544025e7c4abc1862c04 SHA-1: 7e9e88bb15ee4eb5ef9813c532864ac028a866d6 SHA-256: a1044ac6af9ddb22a23b5a1225a5142c47965bf56a628a275000dc4e3925d646
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=docker+stable+version In PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/4948285.pdfIn PDF document text
    • http://brumbum6.xyz/54699382394cc5y9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_60136f43683c2.pdfIn PDF document text
    • http://fogozuvonuw.66ghz.com/44339722917.pdfIn PDF document text
    • https://rofozewoguse.weebly.com/uploads/1/3/1/3/131384025/muranav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458125/normal_6007de332838b.pdfIn PDF document text
    • https://tupeduwexawagov.weebly.com/uploads/1/3/1/6/131607208/075959af8108d15.pdfIn PDF document text
    • http://feelslike35.com/34864020925ddefm.pdfIn PDF document text
    • http://iqecoportal.ru/how_to_write_a_business_proposal_template_freeu84i3.pdfIn PDF document text
    • http://keepmaxi.space/bewuxubokugaxozexofelun3f3nc.pdfIn PDF document text
    • http://finofoze.22web.org/wupozava.pdfIn PDF document text
    • https://tagesokute.weebly.com/uploads/1/3/5/3/135315496/libigoreduzepewijex.pdfIn PDF document text
    • http://bluetea.space/android_easter_egg_che_cosy5ka0.pdfIn PDF document text
    • http://minoduzu.iblogger.org/jaseraniwopojokeki.pdfIn PDF document text
    • http://zebinoleruf.iblogger.org/wolodiritadola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501965/normal_5fd1e57f9e0eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5fdae17e942aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vitorozakosi.rf.gd/dererezelane.pdfIn PDF document text
    • http://zumoriko.epizy.com/fexijaredelejiramokewabub.pdfIn PDF document text
    • http://ravimerafewede.epizy.com/lightroom_5_free_softonic.pdfIn PDF document text
    • http://lepefefila.epizy.com/48959827628.pdfIn PDF document text
    • http://kajomeki.epizy.com/65877376940.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_off0000d1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C3 5056 bytes
SHA-256: f32e5daebe7fbf4da0e0d5077771787655ff66d0af8711a27104d6ed99dcfa09
font_01_sfnt_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 10916 bytes
SHA-256: 8b31d717b4b6ac05d0aa673aca52ba6c51ce5af018d2d9d7c029c583de43ae72

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