Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de7901548588337…

MALICIOUS

PDF

95.1 KB Created: 2021-04-13 02:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ae32336c94218e6e9c6e6ae7cde581cb SHA-1: a900690f5178494ab5be08a7fc58046e81c4ccc4 SHA-256: 0de79015485883372af74614543cf13a930d6f96415d10ad9dc1bd49aad6b45b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a significant heuristic firing indicating it's a link farm hosted on disposable domains. One prominent URL, 'https://jumiwimov.ru/strik?utm_term=ampli+qsc+rmx+1450', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://jumiwimov.ru/strik?utm_term=ampli+qsc+rmx+1450 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412593/normal_602f9560b67b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_60465c3cebc03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_602365a9445eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_605622b9507bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_6050148cc8953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446399/normal_5ff766cb117f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479938/normal_5feb87cd9eed9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5ffff9a1e6b53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vunizi/ms_driving_test_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c183082f-2269-48c6-a171-b8cc38868a16/ft-857d_service_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fe8f23-2f51-446e-baed-32c250b4b6fe/wolf_of_wall_street_meme_throwing_money.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/39516473216.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/xokitosiruzapesixal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f124fd-37cf-4270-8dd0-3bd371a4ab87/smoky_mountain_great_outdoors_smoker_instructions.pdfIn PDF document text
    • https://e321b6f2-2a0a-4c58-8c60-26baf46d82f1.filesusr.com/ugd/14900c_68881608b2d4421d8fed95f340b273ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5272e0c-1c0b-44b8-9159-a6c5e040a1be/fizanuxogumoro.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_69e15dfd159c42c2914b1b1740d3b4c2.pdf?index=trueIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_f138cfa5d1f845ee8acac350ff8659ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/asphalt_8_car_guide.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_61062d753759402e92ecb065e4667307.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_808e72bdbfa74df7bd7b47ce7100f513.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/solonebosop/28294530547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbcc313-c1c3-4956-92f4-6f6006eee2ce/sjcam_sj4000_air_4k_battery.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00011b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2C 5460 bytes
SHA-256: cbf01a11eab3c5921f12daab51e5ca5df71f7c731921283bad2743e4d53acc17
font_02_sfnt_off00012dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC9 12964 bytes
SHA-256: 1e4f5b08370627e21b7df901db6c6dbdf8e1b151397b2c4590d9b25bbba0c740
font_03_sfnt_off00015827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15827 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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