Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d010ea491372331…

MALICIOUS

PDF

74.7 KB Created: 2021-05-09 22:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05923730ff0315dbf560ad855a0664e2 SHA-1: e1bb07c84213b72421dc4e8ae2737831dc35ef8d SHA-256: 5d010ea491372331062333980055b7930e82959b982889095f6aeb58a4e843c5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a callback phishing lure, prompting users to call a phone number for billing or security issues. While no specific script was extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation to deliver a payload. The presence of numerous external URLs, including one pointing to a link farm, further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/wb?keyword=graco%20pack%20n%20play%20bassinet%20accessory PDF link annotation
    • http://leafester.online/sensory_assessment_occupational_therapymvhe3.pdfIn PDF document text
    • https://cdn.sqhk.co/gumojitoxowu/hfqjaD7/rusty_memory_survival_hack_apk.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/converter_para_autocad.pdfIn PDF document text
    • http://creampiepow.club/jejigv37p5.pdfIn PDF document text
    • http://odemebayisitrafik.com/48661933587gtytp.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/ykuoyhc/jebiluzevozige.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/where_can_i_get_a_rapid_covid_test_in_atlanta.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/download_concise_oxford_dictionary_of_english_etymology.pdfIn PDF document text
    • http://fionainthefield.org/abecedario_japones_hiragana_y_katakanagb6o0.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/how_to_design_a_website_using_html_and_css_with_example.pdfIn PDF document text
    • http://doucheapp.xyz/nenobonagatemisovodasodijd3ff1.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/ab3a66d7-3c7d-4ec2-8636-4fadceadb2fe/67590683949.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_d7a612db01144a9a9d18e4701690c4b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2431d6cb-143a-4bc1-bd4d-2a1d00ce4cb7/nurekewalitefubutijugutik.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_a47b27f8b19f4572aa6d706ee77ad8e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e4cc35-1b8b-4418-aca3-931b40a9dda3/johnson_90_hp_v4_outboard_wiring_diagram.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_00c82b9b52a447948295478e65594fc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e528a89-6134-4d2c-bd83-c19c221f9ba4/how_do_smart_scales_measure_bone_mass.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_0fcf51de7cee4feeb8de1164008328b1.pdf?index=trueIn PDF document text
    • https://79d8ee67-2172-45f8-9737-086b37aa5bdf.filesusr.com/ugd/2ab2ae_e4c3e2248f9e4bd9b5fb4a0f00fc6c03.pdf?index=trueIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_27a8644a6d9d4a3b99ac5f7fa59a10cd.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_189290e29612410db89bdd8afe1813cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/555be0a5-22b6-4f45-82d0-32127c0ca9f9/ancient_greece_pictures_ks2.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_off0000e3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B6 5264 bytes
SHA-256: 613bc1166ad60459bd58b3ba46841a8be04f71918a45d93ae5fc1f47e3969c32
font_01_sfnt_off0000f5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B3 11140 bytes
SHA-256: 034210c09dd0c6046618216302ab87d539e3222266e7c0010683eb38fd70278f

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