Malicious PDF — malware analysis report

Static analysis result for SHA-256 9538a31834a7a47e…

MALICIOUS

PDF

115.8 KB Created: 2021-03-27 18:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7051232c569d1ebe7fc82d3f8276c5c4 SHA-1: 3d49863064510dc99eee1a132b1ab5180e4bcf12 SHA-256: 9538a31834a7a47ecf3b1dafd20e65d0596dba0614f57a9c67413627e97bdedd
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a fraudulent number. The presence of numerous external URLs, many hosted on disposable domains, further supports the phishing and link-farming nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=mckamy+middle+school+flower+mound+tx PDF link annotation
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/e11380c.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/feLhaQC/ice_cream_truck_menu_shirt.pdfIn PDF document text
    • http://getyourcredit.info/muruwupedpor3.pdfIn PDF document text
    • http://busforpay.online/28623870247f7dgg.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/idjgjjN/51030560650.pdfIn PDF document text
    • http://dsv-trening.ru/descargar_libro_de_tablas_matematicas_de_arquimedes_caballerowv2qp.pdfIn PDF document text
    • http://azakalaza3.xyz/canonical_transformation5ivcj.pdfIn PDF document text
    • http://drilltech.info/pillars_of_the_earth_gameplay1okw7.pdfIn PDF document text
    • http://italy50wow.pro/jirajiweqcl.pdfIn PDF document text
    • http://cadenalia.com/mapamundi_politico_con_nombress7bs8.pdfIn PDF document text
    • http://blockhcain.host/rock_music_styles_a_history_7th_edition_chapter_16ns25.pdfIn PDF document text
    • http://xitnet.fun/population_actuelle_de_la_republique_democratique_du_congodlizj.pdfIn PDF document text
    • https://cdn.sqhk.co/regisanozoxo/Hiagg8w/77425183791.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/3681082.pdfIn PDF document text
    • http://daimontimur.org/integrated_reporting_definition_deutschlxilz.pdfIn PDF document text
    • http://20970907.net/what_colors_do_i_mix_to_make_emerald_greenj7wnt.pdfIn PDF document text
    • https://dimakevumegipex.weebly.com/uploads/1/3/4/3/134352849/pigibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a25b79-7a03-4a2b-afc2-fae8487ddd0c/simpsons_scientific_method_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65eda028-42ec-413e-bce4-463a488d5127/75437494539.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_off0001866a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1866A 5592 bytes
SHA-256: d5c57f4e954c92189081cd7f05f75212eefbeecf32301119b0df67b65f140953
font_01_sfnt_off0001996e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1996E 11432 bytes
SHA-256: e9eeafe71f13297ff5ff3a75491e15c8e50f7229861e5f4936dff25e3422861a

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