Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91cd6729bf19706…

MALICIOUS

PDF

71.9 KB Created: 2021-06-04 00:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 315ef9c03857d44d8638799ac85bdf8b SHA-1: 3cb25497b04be8bccb9267059112e1eee1e50b8c SHA-256: b91cd6729bf1970644ac9023f13bfdc9c570b940377a4d5212bc81c99fc344d2
134 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs and a 'download button' heuristic suggests a phishing or malware distribution lure. The document body, though heavily obfuscated, contains text related to 'scroll template microsoft word', which is likely a deceptive pretext.

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
  • 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
  • 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://botokaw.ru/123?utm_term=scroll+template+microsoft+word PDF link annotation
    • https://mokaredoraxo.weebly.com/uploads/1/3/4/0/134095924/kijesat-kuvopegira.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4410679/normal_60b560a346192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fd91b889c76c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421366/normal_5fdce3de2a397.pdfIn PDF document text
    • https://jinunogafexaxim.weebly.com/uploads/1/3/4/8/134884933/8914112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutifakukap.pbworks.com/f/83286895128.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144416727/ruwupixidupabifenaronipu.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/14663414476.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/airplay_app_android_tv_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76290d1-4d01-409e-8974-172480bbdca4/surah_al_quran_30_juzuk_full.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/w/file/fetch/144464523/ejercicios_ingles_present_simple_and_continuous.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/f/sixolo.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144565362/lopavadabidobutade.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/what_does_birthmark_mean_in_french.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/jabra_75t_one_side_not_working.pdfIn PDF document text
    • http://vamafob.pbworks.com/f/nojemuzunawadatozarered.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f72e22c-ab07-46a0-ad8b-56ad17f5c320/37200221553.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/w/file/fetch/144578058/vejoxusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531ccc2e-9dcb-40ed-86dc-3a66fe1293f1/one_day_more_les_mis_sheet_music_free.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_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 5496 bytes
SHA-256: cbb6718cc10b2a8092d81f05ffa8c5a072ddd8303a0802902e19fb3c9c393008
font_01_sfnt_off0000ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 10380 bytes
SHA-256: 04a000f7569f64c778b38104e477f0e31647994d0a485f2fcbcac766463472d9

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