Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e47a3ff0887433…

MALICIOUS

PDF

82.9 KB Created: 2021-03-12 15:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67b65de98ddd8a2f7beed2d15265a1d6 SHA-1: b8f080e44ccd96e712594b84129b2a17d1405e6c SHA-256: 45e47a3ff088743359e50b5be5c2e4b1e5fb3a7204d1fd30018debd0efc69925
176 Risk Score

Malware Insights

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

This PDF document, identified as malicious by ClamAV and ML classifiers, contains numerous embedded URLs, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely intended to manipulate search engine results or direct users to malicious sites. The 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam pattern, although the document body itself is heavily obfuscated and does not provide clear instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://soxebez.ru/wix?keyword=hawaii+notary+handbook
    • http://pibarulajido.getenjoyment.net/jack_lalanne_power_juicer_instruction_manual.pdf
    • https://cdn.sqhk.co/gixotagokezu/MIItMja/hair_braiding_salons_in_new_york_city.pdf
    • https://cdn.sqhk.co/kupawusel/jbhWjhF/63051826438.pdf
    • http://fibaxoxadomi.sportsontheweb.net/51381111268.pdf
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/3110645.pdf
    • http://punejew.mygamesonline.org/how_does_drinkwell_pet_fountain_work.pdf
    • https://sikafajowed.weebly.com/uploads/1/3/4/7/134757433/5668267.pdf
    • https://cdn.sqhk.co/nivavepe/eghhhgi/coloring_activity_benefits.pdf
    • http://rabota-plus.club/21214715140drerb.pdf
    • https://cdn.sqhk.co/giganopof/C1gds7l/moxavolifa.pdf
    • https://cdn.sqhk.co/lakodatoli/9Vn8ghf/54688536254.pdf
    • http://azakalaza3.xyz/zogevanurei9l2t.pdf
    • https://kokubuzo.weebly.com/uploads/1/3/4/0/134017800/4041534.pdf
    • http://hamlikjorettoop.ru/ceramic_materials_science_and_engineering_exercises_answersvv8rm.pdf
    • http://chambrehub.xyz/12_steps_of_surya_namaskar_with_pictures_and_names_in_marathipfi7m.pdf
    • https://cdn.sqhk.co/negolura/jehapjb/wrestling_revolution_wwe_2k18_mod_download.pdf
    • https://kozamenarolu.weebly.com/uploads/1/3/2/6/132682647/145cbfb627fddf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://woranuganavot.myartsonline.com/busub.pdf
    • https://uploads.strikinglycdn.com/files/894ab229-903b-418c-9c8c-0b93553bfc4f/organizational_culture_refers_to.pdf
    • https://uploads.strikinglycdn.com/files/c2b961ef-d979-4dc0-969e-7280075750de/sazosozawovojusumetekow.pdf
    • http://lufevexos.atwebpages.com/how_do_i_describe_country_music.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010960.bin
2f57fc4bdbd5aa9f0a576234a229f1cf4646832ed4620c55124c71cfb2a4bd9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10960 5064 bytes
font_01_sfnt_off00011aa4.bin
723dd9f80f913440ba0c2d88959a21b175633e5adb5601252da86bbdc921caa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA4 10428 bytes

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