Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e5a267105b0bd5…

MALICIOUS

PDF

89.4 KB Created: 2021-03-14 02:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3c2f916a63d75e270b40e3941bb0d26e SHA-1: c918600608fe8a0cf53bc2f5536b60fd141833a3 SHA-256: 36e5a267105b0bd5c7989790fdea7c97d15e2c00d9571d503cdfc84e213fa3b0
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate the document is a link farm on disposable hosting and is flagged by a machine learning classifier as malicious. The presence of embedded URLs and the nature of the heuristics suggest the primary goal is to redirect the user to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://yafferge.ru/strik?utm_term=hoover+power+scrub+elite+pet+carpet+cleaner+walmart In PDF document text
    • http://gamowenugeg.sportsontheweb.net/breakfast_at_tiffany_s_truman_capote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_601077d3c633e.pdfIn PDF document text
    • http://axecheat7.xyz/10982837215506j.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/9992972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_603344c0d3e92.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/57408579397.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/actions_the_actors_thesaurus_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_5fd3555fd7b4a.pdfIn PDF document text
    • https://nedalejurozawo.weebly.com/uploads/1/3/0/7/130776692/muleno.pdfIn PDF document text
    • https://kotepavugenufe.weebly.com/uploads/1/3/4/5/134592782/ed3a71e6321d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407998/normal_60079c793bfe7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402250/normal_5fe2467fb1e8f.pdfIn PDF document text
    • https://meremunodimabak.weebly.com/uploads/1/3/4/5/134516451/8999045.pdfIn PDF document text
    • http://investmag.org/vibikefiterapekaku1ry2r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedisijusa.onlinewebshop.net/snugride_click_connect_30_lx_infant_car_seat.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/20516554082.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/accumulated_depreciation_account_in_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/hp_laserjet_p3015_toner_model.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/honeyguide_bird_information.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_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 5332 bytes
SHA-256: cfc46ddcd45a9f36cf37086576d84c0b80d09b4e8152f4d36403179854b5ceb7
font_01_sfnt_off00012fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE9 11360 bytes
SHA-256: 89e73ea4fa79f6bc90660d165041616a91fbb5f58291044623a06dfb3f900b8d

Open this report in the interactive analyzer, or submit your own file for analysis.