Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed711fc1b6c749a3…

MALICIOUS

PDF

74.1 KB Created: 2021-03-09 21:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ccca98fe2388fa3db27bfec22b0ba569 SHA-1: d4284897ccee07c11a5f9ef7fbbf45ca84a84547 SHA-256: ed711fc1b6c749a395d74e63b1c64241fa9b8cfb77dbac3151bf9010c03af4ca
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a very high probability of maliciousness. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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/award?keyword=archicad+19+tutorial+for+beginners+pdf In PDF document text
    • https://cdn.sqhk.co/dowotovewi/ggNhcha/jukoxivu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fcda460a4d15.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/setozajegakomidameba.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/qjjhghd/4_pic_1_word_9_letters_level_3287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5fca188a963d1.pdfIn PDF document text
    • https://golakabuzoved.weebly.com/uploads/1/3/4/8/134870140/tukijebine.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/gOGUsNv/sticker_by_grace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_6033c0438a75a.pdfIn PDF document text
    • https://cdn.sqhk.co/falupuvevore/bhgxge0/73469088366.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/26pPjgF/85335387135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xezaximeru.epizy.com/mass_effect_3_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a933de-5e34-4439-81f0-11c98ed44e23/how_to_pair_swann_wireless_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0447a34-9fb7-47ba-927d-e6e6f9b24377/nabufarozosufenikekub.pdfIn PDF document text
    • http://tatenawagoxibe.epizy.com/remington_700_sps_30-06.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac899b3-27cc-4a05-b41b-a2f3eaff415f/ingersoll_rand_30t_oil_capacity.pdfIn PDF document text
    • http://lewikevizuku.epizy.com/lepokisoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474398fe-6138-44d2-a11d-e65a1a459504/24107858044.pdfIn PDF document text
    • http://wukefomirufiza.rf.gd/dorodibinorukuferolesexuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd72f6e6-9d38-4daa-96ff-458be200d460/after_the_fact_the_art_of_historical_detection_volume_1_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12010b18-fc7c-4e29-926c-c0d94cf514ba/delta_carry_on_luggage_size_and_weight_restrictions.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_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 5752 bytes
SHA-256: b5128d1e1d58c220ad69ffae38fb1cadd5736dd5f3fa0a052c9513365185b63d
font_01_sfnt_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 10464 bytes
SHA-256: 3a4846ba76c24cdd83d605a8585d93971bbffea3d1b7c54f6ad30aa863a1ff5c

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