Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdece81715e75bc8…

MALICIOUS

PDF

77.8 KB Created: 2021-04-14 12:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 123884a41f7b947bebab780ad6af57eb SHA-1: a678f593d5a3c0dd7eba42a6b07cb68c358a4206 SHA-256: fdece81715e75bc8aeabc6759f95151eac6ebff0306de31caba90b0d4a1d0124
146 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 link farms, indicating a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam pattern, where the user is prompted to call a number. While no scripts were explicitly extracted, the ML classifier and ClamAV detection indicate malicious intent, likely involving redirection to malicious sites or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=kitchenaid+food+processor+good+guys PDF link annotation
    • http://vseti.life/android_google_assistant_turn_offftois.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/woxiw.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/9044579.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/833544.pdfIn PDF document text
    • http://regvoolkim.website/official_twrp_pro_apki71hq.pdfIn PDF document text
    • http://reduslim-europa.site/tezumisail7gv.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/why_do_you_feel_the_way_you_feel_brainly.pdfIn PDF document text
    • https://diwesosun.weebly.com/uploads/1/3/2/6/132695938/1097763.pdfIn PDF document text
    • https://buregagoli.weebly.com/uploads/1/3/5/3/135304756/voraporaruxuz.pdfIn PDF document text
    • https://wavujosivisero.weebly.com/uploads/1/3/2/7/132740585/2575806.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/32360800391.pdfIn PDF document text
    • http://oneitstore.info/www.perfect-english-grammar.com_gerunds_and_infinitives_part_2z6bng.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/samsung_air_conditioner_catalogue_2020.pdfIn PDF document text
    • http://bluetea.space/gakokopotejofofurolarud7i6k.pdfIn PDF document text
    • http://sowakowakemim.mygamesonline.org/pupemeberefesosulanak.pdfIn PDF document text
    • http://detonic-hypertonie.website/equifax_unfreeze_my_credit_reportfqzza.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/melub.pdfIn PDF document text
    • http://dk-inc.xyz/88608141888ixjda.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/zmodo_dvr_hard_resetuotjr.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/tivivekezefafonujutovev.pdfIn PDF document text
    • http://italystore.pro/what_is_the_difference_between_maslow_and_herzberg_theoriesgjpow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/jurezavoberax.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_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 5456 bytes
SHA-256: a98cb6416e5f46cd69967f42e9513232ddad52cea94a97419cd2fe5790172f78
font_01_sfnt_off00010132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10132 11460 bytes
SHA-256: 5e2aa3864142ca1097c099dfcf699f6d2f4ab23ae316ccef4697911b2f8dc8aa

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