Malicious PDF — malware analysis report

Static analysis result for SHA-256 346f3bb8ed3eb77a…

MALICIOUS

PDF

81.5 KB Created: 2021-04-05 13:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b283134a8245b4244799e3cdf1c523c4 SHA-1: 7566668be9afb065af7723a992bc379ed423a1a6 SHA-256: 346f3bb8ed3eb77a078bdc542b8f3ac0c714658573128db22988a8c66c3f0200
184 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with a potential phishing or malware distribution campaign. Heuristics indicate a link farm and a ML classifier flagged the PDF as malicious. The presence of urgency and callback lures further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/wix?keyword=directv+genie+guide+title+not+available
    • http://mozodulo.iblogger.org/89789029858.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://jerikedora.iblogger.org/amoeba_sisters_video_recap_photosynthesis_and_cellular_respiration_answers.pdf
    • http://naturebiolog.fun/do_hiit_workouts_burn_more_calories_than_running7lvxz.pdf
    • http://titodisoke.22web.org/evaluation_matrix_template.pdf
    • http://cancandance.org/pin_based_purchase_limit_meaning9ep68.pdf
    • http://presentinsta.site/whats_the_payout_for_take_5f41wi.pdf
    • http://mazisim.mywebcommunity.org/riesgos_psicosociales_en_la_adolescencia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://desujiruvomeb.myartsonline.com/90943484585.pdf
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_89dc6ed2c7d04543a951e785a871407f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/53f77c0f-18b2-47ba-a7a5-b743c1222e19/why_is_finland_the_best_education_system_in_the_world.pdf
    • http://lojupodinitaxug.epizy.com/dvt_guideline_esc_2017.pdf
    • https://uploads.strikinglycdn.com/files/e6cd16e6-183d-4021-8074-48656846dc75/vonixutoraguwiguvi.pdf
    • http://sufizewuwavibu.epizy.com/fimik.pdf
    • https://uploads.strikinglycdn.com/files/42a65ebf-53df-4d78-b7a7-e97f6b2c174e/67575724852.pdf
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_a307f019428e4784932bfefad5d1cfed.pdf?index=true
    • http://gozudil.onlinewebshop.net/caryophyllus_aromaticus.pdf
    • https://uploads.strikinglycdn.com/files/5e61c7f7-d278-45f4-afa8-f20e486413cf/74666462468.pdf
    • https://uploads.strikinglycdn.com/files/9abcc34d-3355-444c-bf00-44cc009606c1/ozeri_body_weight_scale.pdf
    • https://uploads.strikinglycdn.com/files/f99a8f57-2e50-4128-8755-a3a98d9153fe/regulamento_do_imposto_de_renda_rir_99_artigo_311.pdf
    • https://uploads.strikinglycdn.com/files/085690c3-67eb-4a4c-9c74-5fb332c08b19/bozanisuluxaf.pdf
    • https://uploads.strikinglycdn.com/files/76b7cb61-4776-4f2a-a61e-053c5be14c8c/julian_date_converter_2019_online.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f193.bin
a7af0b788bb675d27761143f1df8e4a7c9c847e67e98353f765bc9f6b6bf00fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 5008 bytes
font_01_sfnt_off000102ab.bin
7edf33f5c0abb2d0265b41570de41f93079abe876e421dd81fea19a80a834d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 11144 bytes
font_02_sfnt_off00012890.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12890 4324 bytes

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