Malicious PDF — malware analysis report

Static analysis result for SHA-256 6381dd965ca18d2a…

MALICIOUS

PDF

75.1 KB Created: 2021-02-21 03:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2d9813bcd98ef0beb7271ebbcebfcb07 SHA-1: d623d1a29ad4581da0dee8b4fee0939b96cc479a SHA-256: 6381dd965ca18d2acf46966c9ec86f8493d0832009ce65cc70155901496fabde
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to search queries, aiming to trick users into visiting the malicious sites.

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
  • 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://bologen.ru/strik?utm_term=what+does+the+bible+say+about+integration PDF link annotation
    • http://forkidsshop.online/9737484018fhpl9.pdfIn PDF document text
    • https://cdn.sqhk.co/lekixubegewo/bjeQHkH/pop_a_ball_bubble_tea_kit.pdfIn PDF document text
    • http://jerevuxo.iblogger.org/zazogilonubotur.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/vjbjcgj/ditovusinonopejikafosit.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/rbDiije/top_german_tank_aces_ww2.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/lWyggiO/play_free_casino_games_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/ijiehjw/super_sonic_sprite_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/ehahgjf/76410071412.pdfIn PDF document text
    • http://fepegabilufe.iblogger.org/bavasotosivosanewoteneti.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/biodata_format_for_muslim_marriageh2lbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodikisiti.rf.gd/file_manager_for_ipad_free.pdfIn PDF document text
    • http://fisuwadufojotu.rf.gd/muv_station_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/kemujigosalibebelo.pdfIn PDF document text
    • http://zumoriko.epizy.com/arere_yekkada_instrumental_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/29920724174.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

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_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 5340 bytes
SHA-256: 636c2edba4f6c0feda1b98736193a764b8dc6ffa02b02ef17ae3aec5f05577f2
font_01_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 10916 bytes
SHA-256: 4cf6a9c8627bdcbf39e02cc905e2e36b29b28996b69cee51551c1abb88a5dae3

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