Malicious PDF — malware analysis report

Static analysis result for SHA-256 9549916c08858f9e…

MALICIOUS

PDF

155.1 KB Created: 2021-02-20 14:34:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c6449536c299b8e5da2049b6e0b7153e SHA-1: 912817f59de4a325dc5e9761145a3bb459570e5c SHA-256: 9549916c08858f9edc450e666a95def7679adef7efd870366d24500dc96b3751
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are typical of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://baarspo.ru/aws?utm_term=iomega+storcenter+pro+nas+ix4-200r+manual PDF link annotation
    • https://cdn.sqhk.co/wozovege/mhdjajb/jodavivusobifafe.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/cOddypz/36007724894.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/2968890.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/jipiji-surenufesugo-vukoverira.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/a5892a0a58df.pdfIn PDF document text
    • https://mibubibot.weebly.com/uploads/1/3/1/8/131871690/4307551.pdfIn PDF document text
    • http://raxijulerejo.iblogger.org/likakukuborakesevaf.pdfIn PDF document text
    • http://milanbeach.fun/bass_clarinet_sheet_music_freehxs7u.pdfIn PDF document text
    • https://xamatetafuxu.weebly.com/uploads/1/3/1/6/131606968/1071728.pdfIn PDF document text
    • http://tegonur.22web.org/10447165816.pdfIn PDF document text
    • http://mybatut.store/pioneer_woman_instant_pot_manual_settingvjfr9.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/karonusupu-ritubafezukazin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juwozevukiri.rf.gd/vixunemawubawosujapo.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/87303511329.pdfIn PDF document text
    • http://sejonigimanam.epizy.com/92141279842.pdfIn PDF document text
    • http://vipupirewikome.rf.gd/fikogovete.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_off00020e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E19 5652 bytes
SHA-256: 37201d140c29c9aaae5e012d7cc836b8c3b596033d43188c116fcc15559f6ffa
font_01_sfnt_off00022156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22156 12100 bytes
SHA-256: db0b804d2ae04b343f1be1d58a3620118d194df282716a0dc6f97c156d6f8d6f
font_02_sfnt_off00024970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24970 16060 bytes
SHA-256: 1143ecdd1036854af7781a9416d0a82fe6fe24e09269eea81b933035be45ec4a

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