Malicious PDF — malware analysis report

Static analysis result for SHA-256 370395e3c9f57138…

MALICIOUS

PDF

85.7 KB Created: 2021-06-02 07:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c7262dfacd7da20aae5ea3ca1b6591c3 SHA-1: 080ea96c3e2b0e99e3eae13f821661427b4e7d36 SHA-256: 370395e3c9f57138a84e6d245d994e82122640f81a30345e10829d1ea8cb5695
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL suggesting a lure for downloading SQL Server 2008 R2 SP3, likely a pretext for distributing malware. The PDF's structure and the presence of embedded links point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://cructi.ru/pbw?utm_term=sql+server+2008+r2+sp3+iso+download PDF link annotation
    • https://sawilemevopano.weebly.com/uploads/1/3/4/5/134577559/af9e0b76c9b731d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_60140e7b1645f.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/36f88c8233c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498978/normal_6043798996b8f.pdfIn PDF document text
    • https://roxomikanu.weebly.com/uploads/1/3/0/8/130873860/a8b86.pdfIn PDF document text
    • https://diboboxu.weebly.com/uploads/1/3/4/3/134330346/ratezunafojege_mowutezezudixow_genepuk_gidukilimibos.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://uploads.strikinglycdn.com/files/c2c14fcf-121e-4c6c-b537-289efd77f225/84250383732.pdfIn PDF document text
    • http://ronefete.pbworks.com/w/file/fetch/144490611/winazigap.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/how_do_i_reset_my_apc_ups.pdfIn PDF document text
    • http://vifogajo.pbworks.com/f/modern_warfare_3_bots_mod_ps3.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/w/file/fetch/144491010/balanceo_de_ecuaciones_por_metodo_de_tanteo_ejemplos.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/f/navajo_creation_story_norton_anthology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a607b98-f950-4464-85d7-513d62d8c6eb/tozafabopitovavu.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/w/file/fetch/144472404/e_kitap_okuma_cretsiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bafa406-1aa3-4ae7-b7b0-1b0834ea0099/is_2007_ford_escape_hybrid_a_good_car.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/f/nobujokuli.pdfIn PDF document text
    • http://jeselivid.pbworks.com/f/mulogesofa.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/operations_management_sustainability_and_supply_chain_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a75aeb-d997-40fa-b9ec-2f3e74494769/coleman_hot_tub_codes.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/w/file/fetch/144424017/what_to_expect_when_youre_expecting_book_kmart.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_off0001003f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 5676 bytes
SHA-256: c9b8a82a87ac86c4d72a1124815d4e0ca6a460956dbf873cd4c60dd105d4a540
font_01_sfnt_off00011391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 11852 bytes
SHA-256: 458467738838b06a52351b7d33c8ba87d12147df050f8cd60159b64443abb97e
font_02_sfnt_off00013b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B90 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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