Malicious PDF — malware analysis report

Static analysis result for SHA-256 6114effe1c3328b1…

MALICIOUS

PDF

78.6 KB Created: 2021-02-22 03:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8e02d0c5071e51b36eb09f9ee438f4a3 SHA-1: d343ce86550e6a1be1d05e17d48a3586170cfd55 SHA-256: 6114effe1c3328b1353b8ea88a45ea6e32bf699f35f81f8f0614c783dc9be51d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik'. Additionally, ClamAV detected the file as 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to lure the user to malicious content, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=do+atwood+rv+water+heaters+have+an+anode+rod In PDF document text
    • http://mandarins.space/zubatugocpj.pdfIn PDF document text
    • http://busumewum.22web.org/livegonevatuwiwirazekazip.pdfIn PDF document text
    • http://wuzagabi.22web.org/afrikaans_music_playlist.pdfIn PDF document text
    • http://fitdieta.com/xibawugukuxanerfl18u.pdfIn PDF document text
    • http://popijizixoxovoj.iblogger.org/petemid.pdfIn PDF document text
    • http://testertumentum.space/apc_back-ups_es_700_replace_batterywonza.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/dezajok/aarum_kanna_malayalam_song.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/2011_buick_enclave_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/elfen_lied_lilium_flute_sheet_music.pdfIn PDF document text
    • http://fixadamobus.epizy.com/usb_bluetooth_driver_free.pdfIn PDF document text
    • http://viputedijanoxoz.rf.gd/python_enumerate_dictionary_for_loop.pdfIn PDF document text
    • http://fekunowan.epizy.com/grammar_practice_worksheets_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/40257501502.pdfIn PDF document text
    • http://jufosuliz.epizy.com/68808099330.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/kirby_star_allies.pdfIn PDF document text
    • http://gesulobanaxa.rf.gd/xizururikufefedoze.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/loxupitibinuto.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_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 5032 bytes
SHA-256: aa78f70d3d2e6f9737aa14612902a71ec14273cc0bf07a691befe6872e61125e
font_01_sfnt_off000109c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C8 10556 bytes
SHA-256: df003908361578f45ecfb11fb8cd01f761cf62f646e07818571b79fb59691f68