Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0d00626f04a089…

MALICIOUS

PDF

81.0 KB Created: 2021-02-07 08:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e6eb922f88e67d30e0aa51adc5ad0cc1 SHA-1: d92cff729949498476b03fa189923b8ba1959a42 SHA-256: 3e0d00626f04a0892f2059d5d7ddedb71259461a0693e03ace498921d6ed5da7
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'download button' lure and the overall structure suggest an attempt to trick users into downloading further malicious content or visiting phishing sites.

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://crophysi.ru/aws?utm_term=edmentum+chemistry+answer+key In PDF document text
    • https://cdn.sqhk.co/dodufiruw/jietLeh/daminituzaxaruwu.pdfIn PDF document text
    • http://krym.today/mizexadiwosonbs5nd.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/0R2QjcJ/39538233207.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/98549c24000211.pdfIn PDF document text
    • https://goxapuvuf.weebly.com/uploads/1/3/2/7/132741714/nusofedototi.pdfIn PDF document text
    • http://gladkoe-telo.xyz/koxinezarufare18py3.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/36120219971okxdo.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/texto_argumentativo_expositivozlf64.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/EgeVEii/bixizejudulenaj.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/gestion_de_projet_agilefzal2.pdfIn PDF document text
    • http://montana-media.com/63861355808qmzpd.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/c3293.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/new_android_phones_2017.pdfIn PDF document text
    • http://harmony-market.ru/convert_base64_to_angular_20r5z1.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/ijbrbii/cataclysm_dark_days_ahead_chesthole_tileset.pdfIn PDF document text
    • http://fb-ig-violation.com/wofilafavalixue1xq.pdfIn PDF document text
    • http://winoorama.space/suit_balkar_ankhila_punjabi_songny1mp.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://zatejufeg.rf.gd/nimuvekur.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_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 5136 bytes
SHA-256: 6569b655c07e3df40c990c98bb16deed7bc7d861794f385311dc178a9cbcb419
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 12412 bytes
SHA-256: 19488876a5a3fbdf6fe86c367613d90b1da0bdbb7fe8257f71b6633b558cbf71
font_02_sfnt_off000128c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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