Malicious PDF — malware analysis report

Static analysis result for SHA-256 14755e73ecf57845…

MALICIOUS

PDF

87.8 KB Created: 2021-02-16 06:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1a5957323bc0f4bcf941b95c0d3cf538 SHA-1: 6fe27df05b8dc04cf2e5e1ad0cd6e701c2f84d1a SHA-256: 14755e73ecf5784542661f11e37009a189cc89c385e68a6b51a1e6a876bb8c5b
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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
  • 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/strik?utm_term=battery+tender+junior+red+light+flashing In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_602b3a8d8f789.pdfIn PDF document text
    • http://wowonofejubudib.iblogger.org/arcaea_apk_data.pdfIn PDF document text
    • http://pedron.fun/you_are_beautiful_video_song_freedmbio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff16fe8504b3.pdfIn PDF document text
    • https://bidiruvinevuf.weebly.com/uploads/1/3/1/3/131379477/189403cd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5fe9a110331b6.pdfIn PDF document text
    • http://chunyoo.com/xoluburerawilepuripowud28bj.pdfIn PDF document text
    • https://zetozegazironik.weebly.com/uploads/1/3/2/6/132696155/cedf3c791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_600e5b69c201c.pdfIn PDF document text
    • http://pofitasexa.iblogger.org/zeribiwu.pdfIn PDF document text
    • http://hotita.space/proshow_gold_full_crack_sinhvienitkbxgm.pdfIn PDF document text
    • http://wimilarudiza.iblogger.org/julumokagogo.pdfIn PDF document text
    • https://rebuxikaxaj.weebly.com/uploads/1/3/4/6/134668288/7646926.pdfIn PDF document text
    • http://raicen.com/51085169132bk7d4.pdfIn PDF document text
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/kimet_reguf_tawedixu_vategivefel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470985/normal_601dcb4d961ce.pdfIn PDF document text
    • http://mini-cam-v2.club/885618639881wg05.pdfIn PDF document text
    • http://olymp-trade.top/tomemanuthxlf4.pdfIn PDF document text
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/tuxis.pdfIn PDF document text
    • https://luwuruguvuwotom.weebly.com/uploads/1/3/0/9/130969706/caa2dfb56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001176f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176F 5396 bytes
SHA-256: 014f2a6e5612fc86ee74a7619d96aa827868987c03042be07692d6c42cf50670
font_01_sfnt_off000129d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D5 11640 bytes
SHA-256: bb2b1a69a902fb59e7ddc7032f8eeea7443acc9eb465bc101404733a4be06143

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