Malicious PDF — malware analysis report

Static analysis result for SHA-256 479f097c12b816d3…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 20:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 76e97ac8f9669deeae8cfc03e26400c6 SHA-1: 754aff9681e2c79314d86e9a23dc28c3da2dd74c SHA-256: 479f097c12b816d31e8dab78ff8bb98d825ef3d413eb4a0d150e02fc0cb32b8e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://golowaki.ru/strik?utm_term=dillon+rl+450+progressive+reloading+press PDF link annotation
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/dagin.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/sinagizetupat.pdfIn PDF document text
    • https://nutajutibasetak.weebly.com/uploads/1/3/4/6/134638930/7129834.pdfIn PDF document text
    • https://muvavibati.weebly.com/uploads/1/3/4/6/134669950/503d8.pdfIn PDF document text
    • https://nenodomamik.weebly.com/uploads/1/3/4/0/134095987/nilofuxewaseramo.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/Oiejf2i/40817580159.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/ih7jigi/funny_2_player_games_steam.pdfIn PDF document text
    • https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/4630b6ea1.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/6IhjDHp/19263572849.pdfIn PDF document text
    • http://xuriretijidaja.22web.org/kindle_format_files.pdfIn PDF document text
    • http://midokasek.iblogger.org/acrimony_full_movie_hd.pdfIn PDF document text
    • https://tesazovefikuk.weebly.com/uploads/1/3/1/4/131408970/349f262.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/bedovabakizab-vorisuzes-widumomow-pagolujetunowaw.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/eUjgAhh/shipping_manager_resume_objective.pdfIn PDF document text
    • https://cdn.sqhk.co/nonagidux/gfhiiec/sengled_pulse_solo_smartthings.pdfIn PDF document text
    • https://sozazisoxiz.weebly.com/uploads/1/3/4/4/134463449/nawukunod-molox-mepeleva.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/babetafaperaxov/how_to_learn_korean_language_easily_and_fast_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/cystic_fibrosis_physiotherapy_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/dirabosixewixukitedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a48dd10-0125-453e-a46b-89cb059416a3/the_husbands_secret_ending_explained.pdfIn PDF document text
    • http://marivugedada.epizy.com/bandhan_all_songs_bhojpuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57202093-1c2d-45b5-a68c-3a333b2515af/monster_rap_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52eb9ce3-82d4-48de-9496-1e90f60d0d1b/what_penny_stock_will_go_up_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f22e5a4-c451-47c5-8902-caa826812a1e/how_to_create_a_fantasy_novel_plot.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/jodikibilariturelunepof.pdfIn PDF document text
    • http://jefeduwikiw.epizy.com/6192753366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2fd661-9e3d-4dc7-ab3b-c2ddf4e3c6b9/stronglifts_5x5_workout_warm_up.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/catfish_farming_training_manual.pdfIn PDF document text
    • http://nonibil.epizy.com/why_is_the_enthalpy_change_of_neutralisation_constant.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_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 5540 bytes
SHA-256: 31ceb0ea80b9d8ea26b8ff1360024bf5b99b552a12f162a97f2d3d548ae85077
font_01_sfnt_off00010888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 10660 bytes
SHA-256: bc6df300bf275629290bd759e80dd72586a639efbb4d3f0f69bdeab4398cb9ff

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