Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6572d2d6fb0978…

MALICIOUS

PDF

78.3 KB Created: 2021-03-18 16:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 467e2949547b933053e3d4cb265db7be SHA-1: 8bc16c3dc33f046f1ef76d7c8b8b6f8f95532591 SHA-256: 9d6572d2d6fb09781c89bece82c0bcbe7a2218b2507e0edbfecd19c7ca72b748
126 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to potentially malicious or disposable hosting sites, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true malicious intent by using a large number of links on disposable domains. No scripts were extracted, but the presence of multiple external URIs suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=weider+2980+x+exercise+guide PDF link annotation
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/xebomavotovasusobi.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/999893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_6041d2eb364dd.pdfIn PDF document text
    • http://cozyplacefor.rest/761627957598jpb7.pdfIn PDF document text
    • http://max-lifting.store/free_editable_funeral_program_template_word3bu3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379043/normal_5fe05389ede61.pdfIn PDF document text
    • http://cpskras.website/31362044949ologx.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/31c4d7f.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/zutil_tuxiforumepune_rulololexone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_60186ac57c326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_6023bc997ec02.pdfIn PDF document text
    • http://xuzudedol.22web.org/how_to_map_wd_tv_live_hub_windows_10.pdfIn PDF document text
    • http://kvadro63.ru/54319739136j7dzm.pdfIn PDF document text
    • http://yildirimotobursa.com/xofiropiremabafotogeziloya9d.pdfIn PDF document text
    • http://mefurolawexi.iblogger.org/vuwedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_601cc2c7e6a0f.pdfIn PDF document text
    • http://zajowuresa.iblogger.org/54709853755.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17fce31-a8f8-4b4a-bfc1-3912a97db37b/the_college_fear_factor_by_rebecca_cox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae13b5f6-a6ef-40c4-a326-24c91e5c3382/54147606365.pdfIn PDF document text
    • http://bidasumibave.epizy.com/formation_agent_d_escale_mayotte_gratuite.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/tawotezutodalifimevib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a0896c-ebc4-425d-8fdd-7c959667fca2/newsmax_channel_on_youtube_tv.pdfIn PDF document text
    • http://foguzatizeligi.rf.gd/caseum_amigdalar.pdfIn PDF document text
    • http://wasiligiz.rf.gd/fanibevij.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_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 5572 bytes
SHA-256: 67c33072a514f0063e244450bfa4a8754087bd8bb92738f9b782aeffc46030ca
font_01_sfnt_off0001068e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 10928 bytes
SHA-256: d3af71fae3da6499ec00382b01132f68665becbafd1cdf912bebbdc837ed5340

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