Malicious PDF — malware analysis report

Static analysis result for SHA-256 291946166b923ac7…

MALICIOUS

PDF

84.9 KB Created: 2021-02-22 07:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c05b64233341094408e73290fbbc3e68 SHA-1: 9c7ae5fd5b39acd94a3eeddf9a7d3ba1e51b7f9f SHA-256: 291946166b923ac7f67636b6dcb6742a0055c4959bc61b65c8eae2c29402850e
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to lure users to external, potentially harmful, content. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=notas+para+piano+canciones+infantiles In PDF document text
    • https://cdn.sqhk.co/jivazufevi/ihVQjb4/tosuvexerajot.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/fbdca1908e.pdfIn PDF document text
    • https://mufogijagojar.weebly.com/uploads/1/3/1/0/131070489/2118572.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/tituwam.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/OhjiaFv/rugivomeb.pdfIn PDF document text
    • http://xilegutopeza.22web.org/39767359652.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/jjicJYR/metal_force_pvp_car_shooter_mod_apk.pdfIn PDF document text
    • https://mixenabunagoxo.weebly.com/uploads/1/3/5/3/135320093/b6de5670a783.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/rsLOXid/mobile_strike_craft_nerf_calculator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/44246058519.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/jamaican_bobsled_team_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/needle_stick_injury_reporting_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/xotedig.pdfIn PDF document text
    • http://lamuverifob.epizy.com/greatest_weakness_answers_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/vivah_full_movie_hd_worldfree4u.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/mcc_math_placement_test_study_guide.pdfIn PDF document text
    • http://zuzofigub.rf.gd/android_secret_dialer_codes_list.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/gagavegata.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 4976 bytes
SHA-256: 64c4cbea82c53ae220d8bdeaa851faa7b4e6e180761bb1c6d34979f2081041e9
font_01_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 2532 bytes
SHA-256: 394c240c8e5f3aadab1a709b55e5cbcc1b47e189138539bd4f0501eb3f16b16f
font_02_sfnt_off00010673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10673 12136 bytes
SHA-256: e0a748cf9830ad142abb826bf794f227bd49f3578c8ae73e54d8f23dcca7c6cb
font_03_sfnt_off00012e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E83 16860 bytes
SHA-256: 8f0043a3bb59b5acb357356f6c655d00950ca0c8dd8f21efb6e6b48e9c4d6e88

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