Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c32849832f83960…

MALICIOUS

PDF

82.2 KB Created: 2021-04-01 05:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d724db23c6a66e020c082f20f710a00 SHA-1: 1b673c78d96326844e3557c9770cab4600fd321d SHA-256: 3c32849832f839604dfd64b7e74fa9f0f58dbb13033b480f45949982c90d5649
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://baarspo.ru/wix?keyword=honeywell+th6110d1021+user+manual PDF link annotation
    • https://fexemefamerera.weebly.com/uploads/1/3/4/2/134236105/balofagodexirajexok.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/mizaxamavebuv.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/dupuxemexedugufazozifaguz.pdfIn PDF document text
    • http://disajawamiwa.iblogger.org/separador_de_arquivos.pdfIn PDF document text
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/daac954ad7f33d.pdfIn PDF document text
    • http://jifadixiluv.22web.org/autosys_job_scheduler.pdfIn PDF document text
    • http://tigenule.22web.org/fubofoxirajigod.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/2ad706f39e5dde.pdfIn PDF document text
    • http://samokex.sportsontheweb.net/51341845791.pdfIn PDF document text
    • https://fizubuvi.weebly.com/uploads/1/3/5/3/135301632/defokelozer.pdfIn PDF document text
    • http://opros.xyz/bufimr5k9b.pdfIn PDF document text
    • http://letgtma.bid/nelazq3uon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_1226c0cc24ac490cb31996a110fcab1e.pdf?index=trueIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_bf8df6fb6f7c418797c75f0655c5d20b.pdf?index=trueIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_416ffafb84f4417ea7e2a068a86ad9e3.pdf?index=trueIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_354e550500544faba9a7e83b5b2c9c5d.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_7d7a0005f9b74297a2c3c39832072170.pdf?index=trueIn PDF document text
    • http://xekazaz.myartsonline.com/7006950545.pdfIn PDF document text
    • http://lusiromipu.epizy.com/reading_comprehension_exercise_grade_6.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_b2169f426ce14800972da1d2fa316640.pdf?index=trueIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_56fcad8f64bf4b1594ab3413f6e7ead0.pdf?index=trueIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_8be83feb40234597bd73bfc4bcc76ac6.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_170b4c861f794cfea9db3ad441c364d5.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_0d4dacb1ad3e44afa0ace432146565d9.pdf?index=trueIn 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_off00010192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 5700 bytes
SHA-256: afc8d54b5418a24e17cc22845f02ec0d462fe6ce4833e9993a27b12ed17871d1
font_01_sfnt_off000114e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E9 11240 bytes
SHA-256: 825f48c56c063b2d6f41d726bc5523e9ceff6b00c6c78f30b83426c4d22c9080

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