Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71522fcfba5b502…

MALICIOUS

PDF

79.0 KB Created: 2021-01-26 19:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ee0dbb1e2f2773403f4a6bcf25072142 SHA-1: 5622aaced6176889e4d81a84959ae1311cf56794 SHA-256: d71522fcfba5b50230ded26553b44148d614ac9b0c625e7b41bd8757ecdff583
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the presence of numerous links and the 'Download Button' heuristic suggest a phishing or malware delivery attempt. The document body is heavily obfuscated and unreadable, preventing a more specific analysis of its lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sports+certificate+of+appreciation+templates+free In PDF document text
    • https://gorogonib.weebly.com/uploads/1/3/0/7/130775466/dagavof.pdfIn PDF document text
    • https://gijopufiri.weebly.com/uploads/1/3/1/3/131384250/xuruxuni_daxulixenisoz_mejojexi_xaxibasulak.pdfIn PDF document text
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/4790666.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/9582489.pdfIn PDF document text
    • http://itprod.space/kodable_no_loginxnv9h.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/e5d624f1198.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/8888587.pdfIn PDF document text
    • http://spoonnumberone.xyz/zulexafakidelunoji0bjv.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/je4xgiJ/fidget_spinner_tricks_video.pdfIn PDF document text
    • http://lavkavkusa.store/18532246451xnpan.pdfIn PDF document text
    • http://metinozub.iblogger.org/string._format_java_float.pdfIn PDF document text
    • http://leqqurint.online/sound_effects_appqw7cy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widuxade/jorojasanawafuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/28603015809.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/brahmotsavam_movie_in_tamil_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/labiwifijulunar.pdfIn PDF document text
    • http://mofagadelebedos.rf.gd/zeluzuniwonefudimozob.pdfIn PDF document text
    • http://foripoj.epizy.com/air_cooler_project_report.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 5264 bytes
SHA-256: 8cc81d2ecdae8419f85bce1755b1ad51b9c313a6f4b17ceeaf9e33ee499126b0
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 10520 bytes
SHA-256: 84e668badf7fd15ed3a1b6a1d982dac57d38763acdc500bae1f5daae6f910cae

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