Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1378575b3886ce6…

MALICIOUS

PDF

71.1 KB Created: 2021-02-25 18:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2281ee23e247a4c95fc6b344bf1e3d12 SHA-1: dd4c0cc81da907b306df8ded01774c56491a6867 SHA-256: a1378575b3886ce62656df9b273791555165b37f7db04510cf393757f99a2619
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to contain search-related keywords, likely intended to lure victims into clicking on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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/123?utm_term=camp+chef+pellet+grill+turkey+breast+recipe In PDF document text
    • http://smcjd.com/hp_officejet_pro_l7680_ink_cartridgesatd7t.pdfIn PDF document text
    • http://kyukty68.xyz/asuran_bgm_songs_masstamilan9syw5.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/hijuhgZ/zufubekofazafuwo.pdfIn PDF document text
    • https://sisilodoja.weebly.com/uploads/1/3/1/4/131406442/jonitipoke-biwipadaku-vomitu.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/rujokaju.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/0jhgcjj/maharshi_movie_ringtones_songs.pdfIn PDF document text
    • http://shopbest.online/bachelor_of_business_information_systems_in_canadaxdo60.pdfIn PDF document text
    • https://xurebutira.weebly.com/uploads/1/3/2/6/132681359/968e2307b3853.pdfIn PDF document text
    • http://qlemelest.online/lulesuzoxasoa5l.pdfIn PDF document text
    • https://cdn.sqhk.co/naveropifo/hejcSD5/bloons_tower_defense_3_no_flash.pdfIn PDF document text
    • http://lozhobelir.space/51183453683nyr3u.pdfIn PDF document text
    • https://cdn.sqhk.co/gigepiwej/hdhcQia/rap_beat_creator_online.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/130fc06775de334.pdfIn PDF document text
    • http://cparta.moscow/gramatica_didactica_del_espaol_gratisyoe4q.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/ff5a1a.pdfIn PDF document text
    • http://begdas.fun/603712528597sgkg.pdfIn PDF document text
    • http://vquest.website/blackmart_free_2018sg9xo.pdfIn PDF document text
    • http://optalpha.com/allah_allah_video_hd_songb7bz7.pdfIn PDF document text
    • http://maddot.space/xuwovovupoloxemixiditiximi70n9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD865 5640 bytes
SHA-256: d111b265d181d24b1db4665261c4a43cedf60cc131ab04f3027830fd742c99ee
font_01_sfnt_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 10540 bytes
SHA-256: 959b76b53602654a93293ccf2ce70ce5047de8a60b6da5adbd3cd11ae60318e2

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