Malicious PDF — malware analysis report

Static analysis result for SHA-256 0530e96f280b5b90…

MALICIOUS

PDF

85.7 KB Created: 2021-03-16 09:07:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 809e1ce873b9bc11168935f5b4c1c34d SHA-1: d0ccc72185f0e71f79200b3971d75e5c224af05a SHA-256: 0530e96f280b5b9006211b4fe6ffc24bfdc68be6daca1550475bc47fe8d8b11b
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though partially corrupted, contains a URL related to 'how to reset garage door keypad code', suggesting a lure to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+reset+garage+door+keypad+code+liftmaster In PDF document text
    • http://torchqbfl.fun/field_of_glory_empires_decadence_guide3ox88.pdfIn PDF document text
    • http://world-wildshop.com/the_three_billy_goats_gruff_activities_for_early_yearsp42q2.pdfIn PDF document text
    • https://semizomemakov.weebly.com/uploads/1/3/0/7/130739936/8269958.pdfIn PDF document text
    • http://opensoda.pro/calculer_tva_sur_ttc_formuley3ivh.pdfIn PDF document text
    • http://business-open.online/dawavubojenajezezoxifln5z.pdfIn PDF document text
    • https://filuloxi.weebly.com/uploads/1/3/2/7/132740414/mupinimixiv_jijakuvugurogek_muziwopoguja_jodovelu.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/5951472.pdfIn PDF document text
    • http://show-visitor.xyz/sch_truyn_kiu_ch_giikf7r9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_3c4d41841046461995272328228bb60f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2e0d20-9e3a-4934-8fb5-dba2538d2f36/multiplication_and_division_of_fractions_worksheets_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e73dc2-7456-44e6-afc5-3f65bec12080/why_phone_charger_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78e1a6e-238e-4b46-af93-f3836f5212dd/47841002313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae88f100-10fb-41ca-946e-b5f351d23e6c/what_is_the_core_vocabulary_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89179faa-da8a-4b56-8df6-ec81dc4ce6ab/kitala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5711ebfd-95b3-4e67-9c6a-6f29f86df001/is_galaxy_tab_s2_still_supported.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd6fb98-5eec-472c-b69b-b5e0b447cbbd/fujewagatikasamibaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4620edb7-4bb4-48e0-8622-abfbb855859a/tutazanixeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f443a2f-cab6-415a-b083-c75bc6d7be4c/ejercicios_de_limites_laterales_con_grafica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71b9e70-df47-4f1f-9150-891a4fefa3d5/52507151936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43713802-acf0-4640-a4f2-c22028abdd79/tekin_rs_pro_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa107a48-474b-4e4e-9b83-928824234d7c/yamaha_rx-a740_review.pdfIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_9c4fd407a9614240b8f4fb2fe375d7d1.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_69576ffb566e496aa41ebcaf28e8b667.pdf?index=trueIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_4ad866a1fc144a998e6c27d87675d2ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4210fce-18e4-4fef-9f85-e009fe8e991e/10742226680.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 5376 bytes
SHA-256: b4b4d7e7b9fdc942974414babc2b55fee96700ce47c28188d9cb464129b7430d
font_01_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 11756 bytes
SHA-256: ed4d86bd08f39d8330bbb1eb2a4104118b0167f1ea1d11e11700795f020703df
font_02_sfnt_off00013ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3