Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79ffebbcf023445…

MALICIOUS

PDF

119.6 KB Created: 2021-03-17 13:12:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1a50ea8e7b759d7c843697272a4889ed SHA-1: 2d2fe59484415afd376435bbd9b1ba0400be8443 SHA-256: b79ffebbcf023445a0c95f39f12fc8bdc73efb5397479211049ab592ef0a2433
154 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to a 'flash 2020 season finale' and the presence of external links suggests a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/wix?keyword=flash+2020+season+finale PDF link annotation
    • https://tulopesonu.weebly.com/uploads/1/3/5/3/135318186/mitiverixagotu.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/ac674.pdfIn PDF document text
    • http://sokesiket.22web.org/what_are_the_8_weaknesses_of_the_articles_of_confederation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_60103a4b9f53a.pdfIn PDF document text
    • http://nijuwebil.iblogger.org/jegiferilivudarenibipujiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485587/normal_6008b1e6d741e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456378/normal_600747da1302e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_5fe8c9d5b5224.pdfIn PDF document text
    • https://tetoxoji.weebly.com/uploads/1/3/0/9/130969306/lobezuzapibanupejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://misamoxatupepos.rf.gd/tifuxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/mojuwafowevopaxafozi.pdfIn PDF document text
    • http://buwomonemagup.epizy.com/top_10_best_antivirus_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33cfa292-746e-4ffc-8c32-603263e1ae5e/how_much_is_lexus_rx_350l.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/what_do_you_do_if_you_forgot_your_sentry_safe_combination.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93cd852-3e42-4c50-aa18-80d4f3c740e3/gemagiru.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/xuxukuzeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d32b8f-18a4-4335-9de4-d47650d56a36/gewoxojap.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/aoe_free_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5af542-0b54-4d74-9789-2e7f67333428/88197163221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0e1598-d930-42df-845c-a873997ff4fb/47644656199.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001820f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1820F 4988 bytes
SHA-256: c9dd6b61a82ee168781a507946405dc1db025884b85464a5e795d6bcfd61c9e9
font_01_sfnt_off00019306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19306 12276 bytes
SHA-256: e01f6693ba08411fc5c59b49df58e101877b4937e7fb2094612e7c29f1e04115
font_02_sfnt_off0001bc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC06 16120 bytes
SHA-256: c94926d5202b085e184a5666363eda0a421a0de498e0fbda8ae973291059b9dc